There are a number of housemate services available in the Washington area. Among them:

District of Columbia Roommates Preferred, 904 Pennsylvania Ave. SE (one block from Eastern Market Subway), 547-4666. Cost: $50. 10 a.m.-8 p.m., Monday through Friday; 11 a.m.-3 p.m., Saturday. No appointment needed.

Operation Match: 667-5331, 3511 14th St. NW; 667-7006, 2436 18th St. NW; 289-8476, 1107 1st St. NW (Sursumcorda Court, Harold Valentine). 9 a.m.-5 p.m., Monday-Friday. Free.

Maryland Roommate Referrals, Columbia, Md., (301) 730-7722. Daily, 1 p.m.-9 p.m. By appointment only. Cost: $60.

Room Finders, 66 Maryland Ave., Annapolis. (301) 263-3262; (858-5435 if calling from D.C.). 9 a.m.-5 p.m., Monday-Friday, or by appointment. Cost: $40, plus $35 placement fee.

Operation Match (Montgomery County): 933-9750, 10400 Detrick Ave. By appointment only. 8:30 a.m.-5 p.m. Free.

Operation Match (Prince George's County): 386-5076, Landover Mall East, Promenade 1, Suite 300, Landover. 8 a.m.-5 p.m., Monday-Friday. Walk in. Free.

Virginia Bob Kolacki, Crystal City, 979-1756, by appointment only. Cost: $40.

Operation Match:

Alexandria: 838-4545, City Hall, 301 King St., Room 1100, 8 a.m.-5 p.m., Monday-Friday. By appointment only. Free.

Arlington: 558-2795, 2100 North 14th St., 8 a.m.-4 p.m., Monday-Thursday; 10 a.m.-2 p.m., Friday. By appointment only. Free.

Fairfax County: 799-4109, 3013 Westford View Ct., Alexandria, Monday-Friday, 8 a.m.-4:30 p.m. 8 a.m.-4:30 p.m. Thursdays in Fairfax City at 1 University Plaza. Free.

Falls Church: 241-5123, 300 Park Ave. 8:30 a.m. to 4 p.m., Monday-Friday. Walk in. Free.

Loudoun County: (703) 777-0425. 19 Church St. NE, Leesburg. 9 a.m.-5 p.m., Monday-Friday. By appointment only. Free.

Prince William County: American Red Cross, (703) 221-2161. 242 S. Main St. Dumfries. 9 a.m.-3:30 p.m., Monday-Friday. By appointment only. Free.