It doesn't matter how wilfully potty-mouthed it gets, there's something delightfully and reassuringly old-fashioned about Robert Lopez, Jeff Marx and Jeff Whitty's scurrilous Sesame Street-inspired hit puppet musical.
This is despite a set of furry characters who not only swear, but have one-night stands, screw each other over and mess up their lives in a manner that would make Kermit The Frog blush.
As wide-eyed but unemployed English graduate Princeton moves into the down-at-heel but colourful multi-cultural boulevard of broken dreams that gives the show its title, the monsters that occupy it are either porn-crazed sociopaths, in-the-closet queens, slutty night-club singers or, like Princeton's neighbour Kate, a love-lorn schoolteacher.
The people aren't much better, not even down-on-his-luck real-life child star of kids' TV favourite Diff'rent Strokes Gary Coleman, here played by a woman.
Cressida Carre's touring revival for the team behind the increasingly enterprising Sell A Door company doesn't mess with this formula in a production that puts 11 people, including four puppeteers, onstage with an entire community of pastel-coloured creations.
With a set of 1970s TV sit-com- style show tunes dominating, where Sesame Street - whose creators don't have anything to do with Avenue Q in any way - was born of an inner-city counter-cultural melting-pot, Lopez, Marx and Whitty's show is part-austerity culture slacker comedy, part- seemingly politically incorrect post- South Park cartoon giving the world the finger
In the end, with the puppeteers doubling up as a chorus line as everything comes good for Princeton, Kate and the gang, both come from the same sentimental and gloriously harmonious place.