Bibliotheque, The Library bar, is an impressive and stylish venue, which made the buzz in Jakarta during the last semester of 2009. Not a great party place but ok for an (expensive) drink. It becomes much nicer in my opinion after 10pm as the formal atmosphere eases up a bit and the DJ kicks in.
Be careful, the dresscode is very strict: No short, no torn jeans, no sandals. Expect to pay around 400,000rp for a meal + wine if you decide to eat there.