If I invite a guy friend to a bar am I obligated to buy him a drink?

If I invite a guy to a bar (just a friend, its not a date) am I obligated to buy him a drink or is it fine for each of us to just get our own? I would prefer to just get our own because I don't drink alcohol and have no idea what to ask for. I just like the social setting of a bar to hang out at.

If I invite a guy friend to a bar am I obligated to buy him a drink?
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