From all the options that I tried, I can tell you that Sonagachi in Janakpuri is the best place for that. Just go via Pankha road in Janakpuri and get down at the Exide showroom. Any taxi driver can take you. You would see many girls standing over there, but don't take or talk to any of them, and rather take a broker who would approach you first. Ask him to take to buildings like Nilkamal etc., and don't settle down easily. Tell him that you are not liking and ask him to show more. You would get PLENTY of damn beautiful girls. Then settle for one, and do some bargain on prices. Then you can have your way. This place is damn good, with nice rooms and beautiful girls. The problem happened with me that I used to fall in love with them whenever I used to visit. They are so great! So I stopped going as it makes me feel so sad not getting to meet them afterward. Best of luck and have fun!