In Nana, behind the alley at Business inn, there's a place where the girls wear a green T-shirt and black trousers. It is a place you should try your luck if you happen to go there.
Once I went with a good friend of mine (a girl) to that place for a full body massage. We didn't get a chance to select, but the girls they provided were pretty, bubbly and petite. We both got into a small room (naked). After about 30 mins, the girl who massaged my friend asked whether we were married and wanted to know our relationship wit each other and asked whether we needed any special service for an additional cost of 2000 bts. The girl who came with me said she'd watch and pay but she hesitated to join the action. So the those two girls came near me and took their t's off and started touching my pvts and started the special svc while my friend was watching. The experience was amazing. Total damage was about 3500 bts+ tips.