Peter and James wanted to attend Frolic but got lost on the way and ended up attending a smaller, more dodgy furry meet-up behind a crumbling Rite-Aid. Unfortunately they didn't know that Shank the platypus liked coming to this area to sell bottles of his venom to passerbys. When Shank saw that there would be an all-night karaoke at this meet-up, he couldn't resist and butt in on Peter's performance of the Meow Mix song. Embarrassment then ensued.
Or something like that. I dunno. Make up your own story.