My 2 cents worth on the 2 places:
LOFT - not a chillout place, it's great if ur into dancing and house music / noise. Drinks are ok, almost the same price as zeta bar.
Bangkok Jazz - Used to be great when they had the live band. I must say the decor and the ambience is great though. very very chillout, sofa & pillows as interior. think of La bodega upstairs, but alot more comfortable and posh.
Thai Food upstairs is recommended

Drinks are reasonably priced. i think it's cheaper than bangsar. Parking RM3 only.
~meowz~