Bad treatment

I was at the at Bossa at the entrance I was told all the tables are reserved then I sat in the middle, then I asked the other waiter about the tables and apparently none of those tables were reserved it's just the lady didn't want me to sit there for some reasons I don't know. I left the place without even ordering because I couldn't understand why she would treat a customer like that. Ain't all customers supposed to be treated the same.