Sorry the weed bit was unrelated. More of an example of the weird world of a music venue. They basically didn't care if it was for personal use, but they didn't want people that were clearly going to deal. It wasnt in the employee handbook, just kind of an unspoken rule.

As for the second part, off duty cops would moonlight as security guards. And the college girls could blend in. With the large crowds it was a way keep a low profile for making cash pickups from the dozen different beer/food stations. It's pretty smart. You would never think twice.