Here are the ones that I have accessed from BOM:
Terminal: BOM T1 Domestic
Lounge Name: Carnation Lounge
Access thru: JetAirways / Kingfisher / GoBusiness flights; Visa Signature Card & American Express (dedicated section)
Lounge Facilities: Hot and Cold Buffet, Bar (Chargeable), Massage-chairs
Terminal: BOM T2 International
Lounge Name: Clipper Lounge
Access thru: JetAirways / Kingfisher; MasterCard (Titanium & above only; Access Fee: INR25)
Lounge Facilities: Hot and Cold Buffet, Bar