Filmed in the same general area and right after "The VAn" this sunny beach party of a movie is alot like "The Van"! Duggan from the "The Van" is even in it.
Ive got one of those 'Grindhouse' DVDs and there's a trailer for 'The Van' on it. looks pretty shoddy, in a good way. might have to check it out, and Malibu Beach
FTR one of the movies on that Grindhouse DVD is 'The Beach Girls', which would probably fit into this category I'm guessing. (i.e. nothing happens, teens romping about etc...)