'Disaster!,' the scrappy, witty, ultra-campy new musical that parodies 1970s disaster flicks like 'The Poseidon Adventure' and 'Airport 1975' to a soundtrack of disco-era pop hits, may have been better off staying off-Broadway instead of making the unanticipated and improbable move to Broadway, where it looks and feels out of place and its flaws become more apparent...'Disaster!' takes ridiculousness to an extreme that, at its best, can be hilarious. Visual gags are plentiful and each hit song is integrated with the dialogue in an unusually artful manner...Even so, the show's relentless, one-note silliness grows tiresome, resembling a 'Saturday Night Live' sketch that goes on way too long.