From their facebook event page:
Boo! Come out with your pups for a judged Pooch Costume Contest. Three groups: Small, Medium and Large dogs. Three categories in each group: Best Ensemble. Funniest and Most Creative. Cash and/or other prizes to the top 3 winners in each category. Proceeds to benefit Maxx & Me Pet Rescue. Hey, try THE NEW BARKER cocktail, made especially by the mixologists at Dog Bar St. Pete with our fave Tito's Handmade Vodka - #VodkaForDogPeople And, The Surly Mermaid Food Truck will be on-site for some good eats.