Try Harlem, that's a club for baller in Kolejowa street. That area has lots of clubs. Some other are: Remont near PW (music sucks, but 10zl for unlimited beer is quite nice), Park near SGH, and Underground near UW.
From what i know about clubs in warsaw. the few you mention (excluding Extravaganza) would be considered very trendy. Never saw the attraction about Cinnamon though. Platinium is a very nicely designed bar. Though beware...as these bars are trendy, they are patronised by a fair share of rude individuals who think they are sooooo important.