calling an old friend to have drinks tonight
Since you never said "called" I'm guessing you have not talked with him yet. Hopefully when you get back from your walk you'll feel refreshed and you'll rethink about that call. Do you really want to pour poison down your throat just so you can talk with an old friend? There are many, many, many different and healthier ways of catching up with a friend rather than drinking alcohol and acting foolish.