The theatre company I'm currently at had a welcome picnic to celebrate the opening of our first show. They had a bunch of free food trucks, including ones with funnel cakes and cotton candy, and a dunk tank for the general director.
I'm sitting with some coworkers later in the evening having a delightful conversation about the surprisingly large number of people we know who are semi-professional clowns, renfaires, and historical costuming when we see a jester (jingly hat, curled shoes, and everything) walk into the area. We got really excited and wondered if he was going to do an act or give a speech. Walking with some serious purpose, he made his way towards the free food trucks, disappeared for a bit, and then departed in the same direction he came from with a beverage in hand.
One of my coworkers wanted to know where he got his shoes from so on our way out we circled out in the direction that he came from. We never did see him but based on some signage we inferred he was likely part of a separate performance group that was also using the grounds.
The moral of the story is if you walk confidently enough, even if you're wearing a very unsubtle outfit, no one will stop you from nabbing drinks from the function.