Because if some guys hangout with you, no not even hangout out, they talk to you, then you’re a slut or you’re only there to meet boys when she’s probably the most talented of the group. The jealousy man, one of the worst traits somebody could have.
I really feel so bad for her. Even if she likes one of the guys, it doesn't mean her interest in the club is insincere. And if she had joined for a guy, there's nothing wrong with that if she still participated sincerely and wasn't giving others a hard time. I feel a bit sympathetic bc I think I was seen the same way before and know how often these attitudes can alienate girls from other girls, intentional or not