I test-rode a stretch beach cruiser once. It was a blast. A very nice, mellow ride. A perfect parade bike.
I wonder what would happen if you stripped one down and put light, fast wheels on it.
I've also thought that they could be converted to a recumbent by installing an Easy Racers recumbent "Cobra" seat. Looks easy. ... (link to Cobra seat: http://www.rockymountainrecumbents.c...Code=easyracer)
Then get some ape-hanger bars and tilt 'em back. Maybe even install clipless pedals.
Would you end up with a fairly swift, yet still comfy -- and very CURVY -- ride?
I often think that stretch cruisers have the sexy frame that recumbents wish they had.
What the heck? : )