Depending on the bike shop, they have no issues letting you ride for a couple of hours. Unless it was obvious I didn't like it, I took at least an hour test ride on each of the ones I was considering before I bought one. I was there at opening and they didn't have the sale finalized until about 15 minutes after closing (not me, computer issues on their end). BicycleMan was very accommodating. It was a 3 hour drive each way and well worth it. If you have a shop like that within a reasonable distance, call them up.

BTW, I ended up with a Bacchetta Giro and so far I like it much better than my ICE Sprint.