If you want to have sex with a prostitute in Washington D.C., try the Marriott.

We took the DC Madam's phone records, (she allegedly ran a high-class prostitution ring. It was part of her operating procedure to call the client once to confirm the appointment) converted them to a text file with a OCR (optical character recognition) program, had a batch program run the numbers through a free online reverse number look up service (you enter a phone number and it gives you an address) sorted by call volume, then extracted all the hotel results.

1. Marriott: 489 (18 numbers)
2. Hyatt: 168 (6 numbers)
3. Hilton: 151 (5 numbers)
4. Holiday Inn: 132 (5 numbers)
5. Ritz-Carlton: 118 (4 numbers)
6. Embassy Suites: 117 (3 numbers)
7. Renaissance: 84 (3 numbers)
8. Double Tree: 59 (2 numbers)
9. Westin Grand Hotel: 40 (1 number)
10. Willard Inter Contiental Hotel: 36 (1)

Full listing of all the hotels, inside...

Hotel Name | Number Of Calls | Unique Phone Numbers
Marriot: 489 (18 numbers)
Hyatt: 168 (6 numbers)
Hilton: 151 (5 numbers)
Holiday Inn: 132 (5 numbers)
Ritz-Carlton: 118 (4 numbers)
Embassy Suites: 117 (3 numbers)
Renaissance: 84 (3 numbers)
Double Tree: 59 (2 numbers)
Westin Grand Hotel: 40 (1 number)
Willard Inter Contiental Hotel: 36 (1)
St. Regis: 33 (1)
Four Seasons Hotel: 28 (1)
Washington Court Hotel: 25 (1)
Key Bridge Hotel: 20 (1)
Hamilton Crowne Plaza Hotel: 19 (1)
Red Roof Inns: 19 (1)
City Center DC Hotel: 18 (1)
Melrose Hotel: 17 (1)
Capitol City Hotel: 16 (1)
Churchill Hotel: 14 (1)
Harbor Court: 14 (1)
Hotel Madison: 14 (1)
Fairfield Inn: 13 (1)
Jefferson Hotel: 13 (1)

The results for the Marriott chain are astonishing. With that call volume and number of locations involved , you gotta wonder if the hotel staff isn't in on it somehow.

HOTEL NAME| VOLUME | PHONE | NAME/ADDRESS | ZIP

Fairfield Inn 13 301-572-7100 Fairfield Inn 4050 Powder Mill Rd Beltsville MD 20705
Holiday Inn 13 202-479-4000 Holiday Inn Capitol At Smithsonian 550 C St SW Washington DC 20024
Jefferson Hotel 13 202-347-2200 Jefferson Hotel 1200 16 St NW Washington DC 20036
Churchill Hotel 14 202-797-2000 The Churchhill Hotel 1914 Connecticut Washington DC 20009
Harbor Court 14 410-234-0550 Harbor Court Hotel 550 Light Baltimore MD 21202
Hilton 14 703-418-6800 Hilton Crystal City 2399 Jefferson Davis Hwy Arlington VA 22202
Holiday Inn 14 202-338-4600 Holiday Inn 2101 Wisconsin Ave NW DC 200074
Holiday Inn 14 301-652-2000 Holiday Inn Bethesda 8120 Wisconsin Ave Bethesda MD 20814
Holiday Inn 14 703-807-2000 Holiday Inn Rosslyn Key Bridge Alexandria VA 22301
Hotel Madison 14 202-862-1600 Hotel Madison 15 & M Sts NW Washington DC 20036
Marriott 14 703-818-0300 Marriott Hotels & Resorts 14750 Conference Center Drive VA 20151
Ritz-Carlton 14 202-835-0500 Ritz-Carlton Hotels 1150 22 St NW Washington DC 20037
Hilton 15 703-528-6000 Hilton Arlington & Towers 950 Stafford Arlington VA 22203
Marriott 15 301-670-6700 Courtyard By Marriott 2500 Research Blvd Rockville MD 20850
Marriott 15 301-590-0044 Gaithersburg Marriott Washingtonian 9751 Washintonian Blvd Gaithersburg MD 20878
Capitol City Hotel 16 202-737-1200 Capital City Hotel Washington DC 20001
Embassy Suites 16 202-362-9300 Embassy Suites Hotel 4300 Military Rd NW DC 20015
Marriott 16 202-785-2000 Doubletree Guest Suites 801 New Hampshire Ave NW Washington DC 20037
Ritz-Carlton 16 202-293-2100 Ritz-Carlton Hotels 2100 Massachusetts Ave NW DC 20008
Hyat 17 202-638-5900 Hotel Washington 15 St & Pennsylvania Ave Washington DC 20001
Melrose Hotel 17 202-955-6400 Melrose Hotel 2430 Pennsylvania Ave NW Washington DC 20037
City Center DC Hotel 18 202-775-0800 City Center Dc Hotel 1143 New Hampshire Ave NW Washington DC 20037
Marriott 18 703-471-9500 Dulles Airport Marriott 333 W Service Rd Chantilly VA 20170
Double Tree 19 703-893-1340 Double Tree Hotel 7801 Leesburg Pike Falls Church VA 22043
Hamilton Crowne Plaza Hotel 19 202-682-0111 Hamilton Crowne Plaza Hotel 14 & K Streets Washington DC 20001
Hyat 19 703-713-1234 Hyatt Crystal City Corp 2300 Dulles Corner Blvd Herndon VA 20171
Marriott 19 703-549-3434 Courtyard By Marriott 2899 Jefferson Davis Hwy Arlington VA 22202
Red Roof Inns 19 301-498-8811 Red Roof Inns 12525 Laurel Bowie Road MD 20708
Holiday Inn 20 202-483-2000 Holiday Inn Central 1501 Rhode Island Ave NW Washington DC 20005
Key Bridge Hotel 20 703-524-6400 Key Bridge Hotel 1401 Lee Hwy Arlington VA 22209
Marriott 20 301-670-0008 Courtyard By Marriott 805 Russell Ave Gaithersburg MD 20879
Hilton 21 703-845-1010 Halyard'S-Hilton Alexandria At Mark Center 5000 Seminary Rd Alexandria VA 22311
Hyat 21 301-657-1234 Hyatt Hotel & Resorts 1 Bethesda Metro Ctr MD 20814
Marriott 21 410-962-0202 Marriott Hotels & Resorts 110 South Eutaw Street MD 21201
Hyat 22 703-818-1234 Hyatt Fair Lakes 12777 Fair Lakes Cir Fairfax VA 22033
Hilton 23 202-483-3000 Hilton Hotels 1919 Connecticut Ave NW DC 20009
Marriott 23 301-897-5600 Bethesda Marriott Suites 6711 Democracy Blvd Bethesda MD 20817
Marriott 24 703-849-9400 Fairview Park Mariott Hotel 3111 Fairview Park Falls Church VA 22042
Embassy Suites 25 703-883-0707 Embassy Suites Hotel 8517 Leesburg Pike VA 22182
Hyat 25 703-709-1234 Hyatt Hotels & Resorts 1800 Presidents Street Reston VA 20190
Renaissance 25 410-547-1200 Renaissance Harborplace Hotel 202 E Pratt St Baltimore MD 21202
Washington Court Hotel 25 202-628-2100 Washington Court Hotel On Capitol Hill 525 New Jersey Ave NW Washington DC 20001
Four Seasons Hotel 28 202-342-0444 Four Seasons Hotel 2800 Pennsylvania Ave NW Washington DC 20007
Double Tree 29 301-468-1100 Double Tree Management Inc 1750 Rockville Pike Rockville MD 20852
Marriott 32 703-413-5500 Crystal City Marriott 2980 Fairview Park Falls Church VA 22042
Embassy Suites 33 202-857-3388 Embassy Suites Hotel 1250 22nd St NW DC 20037
St. Regis 33 202-638-2626 St Regis Hotel Washington DC The 16 K Sts Washington DC 20006
Marriott 35 703-734-3200 Marriott Hotels And Resorts 8028 Leesburg Pike VA 22182
Willard Inter Contiental Hotel 36 202-628-9100 Willard Inter Continental Hotel 1401 Pennsylvania Washington DC 20004
Hilton 38 202-393-1000 Capital Hilton The 1001 16 St NW Washington DC 20036
Marriott 40 410-859-8300 Bwi Airport Marriot 1743 W Nursery Rd Linthicum Heights MD 21090
Westin Grand Hotel 40 202-429-0100 Westin Grand Hotel The 2350 M St NW Washington DC 20037
Marriott 41 202-737-2200 Marriott Hotels & Resorts 775 12th Street NW DC 20005
Ritz-Carlton 41 703-506-4300 Ritz Carlton McLean 1700 Tysons Blvd McLean VA 22102
Marriott 47 301-897-9400 Bethesda Marriott 5151 Pooks Hill Rd Bethesda MD 20814
Hyat 53 202-789-1234 Hyatt Hotels & Resorts 1201 24th St NW DC 20037
Ritz-Carlton 54 703-415-5000 Ritz-Carlton Hotels 1250 South Hayes Street VA 22202
Marriott 61 202-393-2000 Jw Marriott Washington Dc 1331 Pennsylvania Nw Ave Washington DC 20004
Renaissance 66 202-898-9000 Renaissance Hotels & Resorts 999 Ninth Street NW DC 20001
Marriott 71 703-920-3230 Crystal Gateway Marriott 1700 Jefferson Davis Hwy Arlington VA 22202
Renaissance 80 202-347-3000 Renaissance Mayflower Hotel 1127 Connecticut Ave NW Washington DC 20036
Marriott 82 202-328-2000 Marriott Hotels & Resorts 2660 Woodley Road, NW DC 20008

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(Photo: Spreegurke)