The 2 reasons I drink:
1. I'm bored.
2. I drink when I go to bars to meet people and have interesting conversations. While I can make conversation with anyone, many people aren't that interested and it's boring to sit around waiting for something to happen.
I have hobbies but they aren't something I want to do at 8PM on a Friday or Saturday.
I only drink on Friday and Saturday and I rarely get hungover.