Re: Turning 21 soon. What to know about bar etiquette and what to drink?
This is good advice, but I'd advise tipping as he goes for his first night out.
It sounds like he's going to be bar-hopping anyway, and besides,
if he goes from tipping huge on the first drink to asking what's in a Jack and Coke, he's going to seem like he's trying to be a hotshot.