Hi Dolphin,
Suan Lum opens at 6pm. U can bargain, definitely, just like patpong and its near to Patpong too. So, u hv to plan d trip properly, there, u will not lose time ma...can shop till u drop. Suan Lum closed at 11pm, so can proceed to Patpong from there. About 50 baht by taxi n of cos...