External aids can help to jog memory during early stages. Reminders about where things are, saftey measures to take and seeing a friendly face or place can mean the difference in preventing harm, agitation and further confusion.
This would be an awesoem idead for your restaurant's anniversary. Get your regulars to do this and seal it for 5 years like a time capsule. Ask them to discuss favorite server, dish, decor, weather. marketing (great local news story in 5 years too).