The first entry in A.I.P.'s surfside slapstick series, "Beach Party" stars Frankie Avalon and Annette Funicello as fun-loving teens who become the subject of anthropologist Bob Cummings' research into adolescent mating rituals. With Morey Amsterdam,Dorothy Malone, Dick Dale and The Del-Tones, and Harvey Lembeck as Eric Von Zipper. Next, Frankie plays himself and mop-topped British pop idol the Potato Bug (get it?)-and both are vying for Annette's attention-in "Bikini Beach," co-starring Don Rickles, Keenan Wynn, Little Stevie Wonder, and Boris Karloff. 198 min. total. Widescreen; Soundtrack: English Dolby Digital mono; Subtitles: French, Spanish; theatrical trailers.