Why???

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So I went to the gym yesterday morning for a strength workout (rows, squats, lunges, hang cleans, triceps, chest and biceps) im trying to get ready to get back into the body pump class I dropped... and I was looking around the free weight area and noticed I was one of the only girls in the free weight area everyone else was some meathead guy....all thw other girls who were doing strength wprkout were using the machines.... why is it this way????