Do work out gyms have good trainers or does it depend of the gym you go?

Babygurl155
My brother and I are thinking of signing up together which I don't know how to think of it. It would be our first times going to the gym I want to make a healthy change in my lifestyle. I want to be dedicated loose pounds on my belly and thighs. Also is it possible that I could go to the gym even if I have college or a part time job?
Do work out gyms have good trainers or does it depend of the gym you go?
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