If you like Muscle, go to TawanTawan Bar is probably the only go-go bar of this kind in the world.
Depending on when you go, there's usually a good mix of really buff professional bodybuilders, muscular, well toned to a tad chubby.
The staff are friendly and attentive, the bar is well managed. (i.e. they don't hound customers for drinks or tips like other bars can)
Tawan is open 7 days a week, from 20:00 until 01:00. It starts to get busy around 21:00 and even more towards 22:30, when it's typically packed.
There always one show daily at 22:30. (Get there early to grab a good seat) If it's busy enough, usually on weekends, there will be a second show around midnight.
Drinks were somewhere between B240-B260 as of April 2010(I don't remember exactly) . Drinks are more expensive compared to a normal bar, but that is because bars like this don't charge a cover for the show and they need to pay the staff and the entertainment (female impersonators). Drink prices will be pretty much the same at any male gogo bar in the area.