I've been once about 18 months ago. Did a bit of research but ended up going to Glass Alley. Walked through twice to get a good sense of what was on offer. Ended up with a petite, skinny, porn star looking Turkish girl with big fake tits. Not my usual type but her body was ridiculous. Wasn't a great punt though as after a bit of friendly chat, she just switched off and laid there. One of those that doesn't let you go all in either, which is annoying. Would love to know better options in the city too as I'll be going back...
