You might want to avoid the Sheraton Skyline on Friday nights. The hotel usually organises a huge Mumbai Nights party on Fridays, and there have been lots of reports about nasty noise levels, fire alarms going off in the middle of the night, etc. Having said that, I would note that Mr Canuck and I stayed at the Sheraton (via Priceline) on a Friday in late March. Having learned too late about Mumbai Nights, I called ahead and asked for a quiet room, which we got - and it seemed to be a Club Room, too. Not bad for 40 pounds. We skipped the Hoppa, and caught the free local bus instead from the central Heathrow terminal.