Ahhhh, the 1980s. Aerobics replaced Disco as the trend. Who can forget those tight, shiny, satin aerobic outfits that graced many spas? Any actress or beauty who looked good in one of these outfits came out with a VHS aerobic-workout tape. 1987's "Aerobi-Cide" (aka "Killer Workout") capitalized on this trend, sending a slasher into one of these spas to inflict gory carnage on very fit damsels.