[quote=@HeySeuss]
All that disco love. There will totally be some sort of series of events that compel them to go to a hair rock concert. Or maybe a hardcore show.

Edit: And something involving a roller rink.
[/quote]

Adding it into my headcanon-- The Unicorns have a roller derby team. It just looks like a random collection of people that would never associate with one another ever, since Stella's the "last one" but, they dominate the hell out of roller derby. 
The Strangetown Stranglers.
Stella's totally on the team too.