As Valentine's Day nears, the call of the singles grows louder: "There are no good [insert gender] in D.C." Well, complain no more. For those looking for Mr. or Miss Right, we've scoped out four cities -- Austin, Colorado Springs, San Diego and Raleigh-Durham, N.C. -- with some of the country's largest populations of young professional singles. The we identified some of the cities' swinging venues, both indoors and out. (The cities were ranked by Sperling's Best Places, a Portland, Ore., research company.) Now it's up to you to make a match. -- Andrea Sachs
