What started as a regular orientation for the new fitness instructor quickly escalated into an impromptu workout of a different kind. Four sweaty bodies found better uses for the gym equipment than originally intended, with toned muscles and tight fitness gear being shed faster than calories. Watch as our busty blonde and curvaceous brunette demonstrate positions you won't find in any training manual. The real party was just beginning when they had to rush off to their evening engagement. For the continuation of this hot and heavy training session, check out our exclusive swinger content.