Quoted from NM:I heard there's a City ordinance against that--so getting one to do so adds to the difficultly.
Not 100% sure--as I always rent a car to be able to come and go at will--and hit In-N-Out at will.
The ordinance, I believe, is only in place on the strip . . . they want to force people to the hotel lines for a more orderly pick up (which makes perfect sense). You can flag them down out by the PHOF per my understanding (though I could be wrong).