Seaside, Oregon was a very pleasant surprise. Seaside, Oregon is a throwback to my childhood. You can play on the Beach, go to an Arcade and ride the Bumper Cars. You can rent a bike/surry. There are plenty of shops, Curio Stores, places to eat and shop to your hearts content.
There are modern hotels literally on the beach. There is an outlet mall within walking distance of the beach & Shopping Strip.
This is the closest I have seen to Old Orchard Beach in New York State or Rehoboth Beach, Delaware; not quite the dynamics of Coney Island in Brooklyn.