Blimey, every time I think of a great short par 4, it turns out to be over the 280 yard mark, so this is tricky.
I'll second Sean's suggestion of the 9th at Beau Desert which is 260 off the back, 252 off the yellows.
Though not universally loved, the 18th at North Berwick is 278 off the back, 271 from the yellow. Look out for the car park!
Others require a little manipulation as it were...
The 3rd at Mackenzie's Cavendish is a great short par 4, plays downhill and you can run it in from right to left but too far left and there are bunkers or the green drops off. 281 yards from the yellows, but as its downhill, maybe it can sneak in, and I seem to recall its a Tom Doak favourite? The 4th at St Enodoc plays 279 off the yellows which is where most of us would play it from, and what about the 14th at the Kings at Gleneagles at 249 off the yellows?
Having listed those above, I would think that any sub 280 yard par 4 is within range for enough people for it to be damn good fun having a go at the green, even if the architecture itself isn't great?
Cheers,
James