A proven method to unwind involves spending money - some of which you could do at the book fair, or at the mela at Gymkhana grounds. Less material delights could be had at the dance ballets, music concerts, and painting exhibitions. Also, find out the best college cricket team in town.
Listening to your favourite track on full blast, on a super-powerful music system can be a bad idea, especially with irate neighbours around. Try Ahala.