Chennai is known for its coffee shops, no, not the cafes. Apart from that, there are shops that sell coffee beans to the people. The people here prefer and like to make their own coffee. Nothing can beat the taste of home made coffee. Instant coffee - nah, I don't like that much. Infact, I have bunked last periods of college just to have a cup of coffee within that stipulated time (6 PM).
Filter Coffee is aromatic, hot, relishing and energising. You couple that with some snacks. You experience the best feeling.
Contrary to popular belief, Filter coffee is very good for health. Due to the caffeine present in it, it helps us being active all day. This could be substituted for Red Bull. :P