At least in most jurisdictions, the egress to a gathering area can __never__ be blocked, there is some provisions for delay on emergency exits, but those require NRTL certification, and are actually usually mechanical.
You might be able to lock it down during periods of limited occupancy, and you can rig it to an annoying alarm, and maybe try to identify the person, and ban them from future. It is possible to get variances for this, but you usually need to either be a medical or penal facility.
You might be able to lock it down during periods of limited occupancy, and you can rig it to an annoying alarm, and maybe try to identify the person, and ban them from future. It is possible to get variances for this, but you usually need to either be a medical or penal facility.