Just Saw It On THIS -- SPOILER!
That was the movie I remembered.
Cliff Osmond stood out in everything he did, so when he told the little blonde guy to 'put on the bikini and do us a dance' you don't forget something like that.
I didn't know the fella DID put on the bikini, but I remembered Osmond did have him beat up, and I remember he turned on Osmond and helped Wilde and the others escape.
Didn't know the kid died at the end either.