Should I buy just you or you and your friend a drink?

Ladies if you were sitting in a bar with a female friend and I was interested in you. Should I offer to only buy you a drink? Or would that be rude? If I offered to buy both of you a drink would you think I’m trying to see which of you I had a shot with? I don’t want to be rude to your friend but I want to meet you.
Should I buy just you or you and your friend a drink?
Post Opinion