This is a little longer than what the OP asked for, but it could be modified. We had a Frightful 50 Halloween ride ... 25 and 50 mile routes on rural roads that stopped at 3 or 4 old cemeteries. Rides were done in daylight.

Another area club has a progressive dinner ... roughly 25 miles around the city with stops at 3 or 4 restaurants. Takes a little organization in that it requires advance signup and contacting the restaurants for buffet setups.