Where can I meet a girl for a relationship?

I'm 26 years old and I live in New York City. I've joined gamblers anonymous because of a gambling problem that I had up till about 6 weeks ago. I don't have too many guy friends who introduce me to girls. I think I'm smart(I'm in law school), funny, and pretty good looking. I just don't know where to meet girls and to maintain a relationship. I went to a cool 80's bar Saturday night and met some nice girls but nothing will develop and nothing has ever developed from that scene. Actually, I've had more success when I was younger in that scene, now I can't seem to get any traction. Does anyone have any clue what I should do. Because I'm really getting down on myself when I shouldn't because I have a good job (paralegal) and a great apartment and food everyday and I'm really healthy and I love to rollerblade it's just I have no girlfriend and it really really bothers me. I do have this one girl who wants me to be her boyfriend but I don't want to. I want to try another girl.