I'd be up for it.
I've done it once before, I was on my own, but tagged onto a group of 12 other lads. I think they were all from the same company and training for the Man>Blackpool ride. Anyway, they were all novices and none had ridden fixed before. At the end of the session, the coach lines you up and everyone has a crack at a timed flying lap - bit of friendly competition like.
The coach must have said about 20 times, "when you come over the line, remember to keep pedaling!"
First guy over the line (just before the banking) forgets the advice. Bike nearly throws him off, luckily the chain unshipped and locked the wheel and he skidded gracefully into the side. Could have been very nasty!
Its a right laugh - you get pretty sweaty though.