Most massage places will be good places for you. If you want something a little different, why not go to The Star of Light bar in Patpong...you can fuck the girl on the lounge in the bar. There may be people walking in and out while you are in action but they have seen it all before. Another suggestion is Lolitas or Kalasong...both are blowjob bars on Soi 8 Sukhumvit...you can fuck the girls also if you choose but I think they may charge a little more if you want more than a blowie.