7UP seems to be more commonly drunk than water, but isn't so great in the intense heat. Try the local mango juice, although it seems a tad sweet for some.
You will find any number of Wine shops around the city.
Coffee shops and juice junctions are everywhere.
Siva Coffee Bar is a chain of Coffee shop around the city.
24 Hours Coffee shop near salem Bus stand and Junction.
Iyengar bakeries open 24 hours.