I have gone to this place only to sit in wee hours after midnight. Its a good place to relax and sip some good and I must say Cheapest cold coffee (Rs 120) considering it is in Sahara Star and comparing to other 5 star hotels.
It is atleast better than Balaji at the Airport.
Also, if you are Hungry!! you can hog on their wide spread mid-night buffet for wonly Rs 550 + taxes.
The ambience is great as well and staff friendly. But you will not get drinks served after 1 am.