Can an assistant store manager legally ban me from the store?

Question Details: I usually joke around with staff because it's the night shift and boring. I usually go to the 5 hour energy display which is on the counter. I hang there until my co-workers get done and sometimes I move the bottles around. The staff usually laughs and don't care. However, the assistant store manager informed me in a nasty and threatening manner to stop. I informed her that I wouldn't do that again. She said that I better not and if she catches me doing that again she will ban me. Can she?

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