[ddantas]

The two groups police themselves and do not allow members to drink alcohol in the open.

Hehe, we had that back in my college days, we called it "put the vodka in a ginger ale bottle so it's not in the open" Or "put the run in a ginger ale bottle so it's not in the open". Or...you get the point.

[GSlob]

“They can’t go on school grounds with alcohol and liquor. We’re not going to let them. It can’t go on at the stadium because it’s against policy. If it’s going to happen on our school grounds, it’s going to have to follow the rules...”
OK. No more beverages in containers, open or not. Alcohol can only be within the actual person, and not on or about him/her. I'd go with it.