You need to get out more. The guy in the bathing suit was a northerner.
The music was raw, very basic, somewhat derivative but entertaining. There was a similar group that was quite popular in my parents’ day called “Hot Nuts,” they played all over the southeast, particularly Myrtle Beach.
This apparently was a regional movie with amateur actors, documenting a popular music scene in Texas, in 1957 from the looks of the cars. They probably knew the bands, having seen and heard them before.
Doug Clark and The Hot Nuts!
Classic bad taste frat house party rock ‘n roll.
“See that man with the sad expression? Lost his ***s in the last depression. Nuts! Hot Nuts! You get ‘em from the peanut man!”