There aren't too many nice nightspots in Chennai, but Chipstead is an exception on a few counts.
Firstly, the prices for alcohol! Who wouldn't want large Belvedere, Gold Label, Glenmorangie, etc. for less than 600 Rs. This is something unheard of in the rest of India and I do bring friends here if they come into town. They have quite a range (sometimes a few things won't be available), and Taj service is always classy.
To top it off, this place usually attracts a nicer crowd and a large one if there are visitors in town, and other decent bars in the vicinity.