I agree with Mike that this stemmed from a breaking of show and/or venue rules, and that it probably would have affected liability insurance coverage.

The other thing I find interesting is that the two that were partaking were so defensive of their being able to take a drink that they were willing to be expelled from the show. No way to know, but the heated exchange may well have resulted from feeling "ten feet tall and bulletproof", as they say.

SRH

May God bless America and those who defend her.