Does anyone do Yoga?

My housemate wants to try Yoga and wants me to go with her. My first thought was GAYYYY but then she said its a fire shaper one that you do in extreme heat and it sweats out all your toxins and helping with toning and weight lose. I drink quite a bit so i wanna go to cleanse my system. That same feeling that you get from the gym. What is okay to wear at yoga? when i face booked the business we wanna go to the lady said compression pants/skins and a tight top that covers the armpits... is that what all guys wear? I'm kind of really embarrassed at wearing the tight compression pants because it puts everything on display and my package is really small and i don't want my housemate or others seeing that lol
Does anyone do Yoga?
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