It depends on what they knew and what they allowed. If it was against policy for drinking in the facility for coaches and staff, and they didn’t enforce it there could be an issue.
When I was a bartender part of my job was tracking drinks to tables. I more than once had to cut off customers and call taxis. Had undercover ATF buyers a few times, they told us after watching service and trying to have underage buyers. They made our liability perfectly clear about serving too many and what could happen if someone was served then drove drunk.