So KN and I are chatting about who here would be what muppets if we were all the muppets. What I have so far:

Thefremen would be Fonzie Bear

Dennis would be Skeeter (since he owns the place, I know skeeter's uncle owned the theatre but it's close enough)

Zippy would be Animal (confusing and easily excited)

Theory and Tollwutig would be Heckle and Jeckle (IIRC, the two critics in the balcony...)

Couldn't think of any others straight away...but here's what Theory and Tollwutig would be like:

Theory?: Hey ya know this thread isn't half bad!
Tollwutig: Sure but I know one way to improve it.
Theory?: What's that?
Tollwutig: LOCK IT!
Both: hahahahahahahahaha!