Honestly even if the goal was to deter problematic levels of public drunkenness then that would work just fine. You probably won't be let in if you show up bell

Honestly even if the goal was to deter problematic levels of public drunkenness then that would work just fine. You probably won't be let in if you show up belligerent, and the combined pressures on volume and evidence usually means that people sneaking in drink don't become problematic.