Bangkok used to be noted for its wild all night massive party clubs, but this has changed a bit over the years. With a maximum 2am closing time in effect for most legit spots, it's no longer party until the sun comes up, and additionally, young Thais have taken to frequenting smaller and more intimate venues as of late, so the big clubs aren't being built anymore. That said, there are still a lot of good places around the capital to go dancing, and there is a fairly varied selection.
Undoubtedly, the hottest club right now is the wild Sing Sing Theater, a Shanghai 1930s fantasy that fuses theater with dance club. Also popular with the highbrow crowd is Ce La Vi (the former Ku De Ta), the well known stylish nightclub from Singapore, which has opened a magnificent spot high above the city on Sathorn, featuring 7 themed bars and 2 nightclubs. Those who want a big party experience head to the happening Levels Club over on Suhkumvit Soi 11, which is one of Bangkok's hottest party spots.
Other newer and happening openings include Beam and Demo over in fashionable Thong Lor, both of which have DJ's spinning house, techno, and hip hop to go with the great mixologists at the cocktail bars. along with Bangkok's best hip hop venue, Sugar Club.
Of course there are still some of the top longstanding clubs in other areas to go to as well, like the longstanding party venue Route 66 on RCA (Royal City Avenue, same venue as Onyx). And if you want to stay up all night, Insanity Nightclub on Sukhumvit tends to stay open anywhere from 3-6am, and nearby Glow is famed for its late night underground parties.
Wherever you choose, you are guaranteed a good night out with all the Bangkok dance clubs have to offer.