But just like all the other laws this is mostly ignored. Supposedly when you leave a drinking establishment they are supposed to put it in a disposable cup/glass. It has nothing to do with safety of sensibility - they don't like cleaning up broken glass from all the bottles that are dropped/thrown from the golf carts.
I must say the streets are much safet to walk on without shoes these days. When I first came here there were broken bottles everywhere.
AND nothing stops the folks from flying down the now better streets waving their drinks and laughing as they fly over speed bumps.