It appears to be much easier to punish the majority for the transgressions of a few. For the landlord to require the person using a glass, or any other item, as a weapon, to leave his premises is z simple request. If not leaving voluntarily then the individual should be escorted from the premises. Otherwise the landlord is derelict in his duty of care to the public, as his guests.
Note that it is an offence to be drunk in charce of a bicycle. Likewise a motorcycle and even a pram!

Colyn.