There is a bunch of semi-pros in Old Man's pub. The charge is 20K for as long as you can negotiate and click, and depends on the time of the night. Only if desperate and is your cup of tea. I don't recommend P1 at all. Too commercial.
Hallo Bar, although Tier 3, is a better bet if you want to take someone back home. They stArt with 35K but usuakly settle for 25K if you look serious and are not bitching with girls.