Not under any circumstances.  The concept is pretty easy to grasp even for the thick skulled people that have been the ruin of many a fine show in the Philadelphia music scene over the years. 

We'd prefer to ask you to leave then to have to carry you or someone that you hurt out to an ambulance. If you don't understand this please stay home.

Is this serious?  Yes. It is a show stopper. Sorry we aren't cool / hip enough to let people hurt themselves or others at  shows.