A few of my friends and I went over to a local pub, as they have, in the back room, a couple pool tables, and we wanted to get a few games in. We were about 1/2 way in our game when I went to order some food, and the guy asked to ID me. Since I'm underage, he told me to leave. Is it legal to have to leave the pub, even if the pool tables are in another room? I'm assuming yes, but I'm just double-checking.