I believe that the 500 club was on South Missouri Ave. (Trump Plaza garage sits there now) in Atlantic City owned ny Paul "Skinny" D'Mato Sinatra played there Martin and Lewis teamed up for the first time there the casino was in the basement under the stage many jokes by the comis about "playing" over the tables burned down in the 70"s I have chips ashtray and souvenier photo album covers from the club