No purchase is required to come in and get out of the cold, but dining is an option. Sit, relax, and tell your Cache hunting stories of the ones that got away.
There is parking outside of the Diner (not inside..who would be silly enough to think inside?) along both streets. From Downtown Cincinnati, take Interstate 75 South, across the bridge into Kentucky, to the first exit. Take W5th Street toward Madison Ave. Turn right on Madison Ave. Rima's Diner is about two blocks up Madison on the right.
So come as you are (or dress Hollywood style) and have an enjoyable evening with friends. There will be a surprise at each table for you to enjoy and a table provided to trade trackables. Wheelchair accessible.
In case of inclement weather (snow storm, blizzard, ice storm, etc ) this event may be cancelled. So log your "will attend" and you will be notified if event should be doomed.