Old McDonald had a farm

I think I might head to the upcoming Reigning Sound show in my neck of the woods. You might remember the lead singer and songwriter from The Oblivians. Anyway, I'm gonna be sure to spend my time wisely at the show. That's right, I'll be playing hipster bingo. Is it legal to dress up as things yourself just to cross them out for bingo? I'm thinking I may have to go as "uber-hot asian hipster (female)"