One of the spin offs (sorry) of HSBC bike rides is a pair of Wattbikes in their Glasgow (and Edinburgh?) branch.
I took a hurl albeit slightly struggling with the fine tuning and straight off the street, but was disappointed to only peak at 750 Watts (last time 1050)
A few forumites I know have broken the 1KW barrier, so how about persuading the bank (or running a covert CCE version on here) of a leader board
Post your peak output and steady output over say 3 minutes
Any other options - I did do 3 consecutive rolling start 200m sprints on Wattbikes all within 12 seconds IIRC the best were all sub 10.