I've noted here several times that St. Louis, or at least a lot of it, likes an excuse to drink in public. This band, setting up before the pet parade, was sponsored by a bar in our Soulard neighborhood where this takes place. Note the golden glass of beer on the stage floor. This was at about 12:30 PM.
The consumption on the streets Sunday will be trivial compared to the Mardi Gras Grand Parade this Saturday. And since we just got legal recreational cannabis in Missouri, I expect the air will be redolent with an aroma richer than Budweiser.