Fans of the 1964-1965 New York World's Fair will probably remember the Greyhound Escorters. Sort of a motorized rickshaw, the Escorters had a driver in the back and room for up to four passengers in the front. The driver was also a tour guide, taking guests on personalized tours of the Fair.
The Escorters only were used for the first year of the Fair. They were expensive to rent and prone to breakdowns, so they were quietly retired from service without any fanfare. That wasn't the end of the Escorters, though, for they were later spotted giving tours of the boardwalk in Atlantic City, NJ.
The Greyhound name on the front was crudely covered over, but even so there was no mistaking that these were indeed the same vehicles as seen at the Fair.
I believe this picture was taken in 1971. I'm not sure how many of the Escorters made it to Atlantic City or when they were finally retired. At least one is in private hands undergoing restoration.