I can put my legs behind my head and sing 'Happy Birthday.' Because that's something that me and my friends used to do when we were in gymnastics class as kids and I can still do it. I was doing it since I was 8 and 9. They used to call me Gumby. Very bendy.
To keep it simple you run your gym like you run your house. Keep it clean and in good running order. No jerks allowed members pay on time and if they give you any crap throw them out. There's peace where there's order.