To give more context, I've been invited by my financial advisor to a birthday "bash" at an upscale bar and I would like to get him a gift (or/in addition to maybe buying him a couple of drinks). I wanted to know what would be appropriate to gift, as I'd like to get on friendlier terms (not that we aren't already, we're actually pretty casual and friendly; I just like him as a person and would like to know him more and/or become friends with him). I'm a 25 year old male and he will be too by then, so I can't see age/gender really playing too much of a role regarding appropriateness.
My concern is that I don't want it to affect my client/service provider relationship negatively, so should I even go and if I go, should I even buy him a gift/drinks? It wasn't specifically made clear what kind of expectations there were on the invite, it just sounds like we're all going to casually drink (getting drunk is unlikely to happen). I want to note that it does seem like friends and family were also invited (going off of context clues on the invite thread), in addition to clients if there are other clients.
To rephrase the question in a way: if a vendor were to invite me to a birthday social event and I'm interested in building that relationship with the vendor as a client, what are the best practices for maintaining professionalism while also nurturing the relationship positively?
This is in the Southern United States, but for the area I'm in there isn't a lot of cultural stigma on drinking/excessive drinking. I live in a bit of a party city.
I plan to just buy a birthday card with a gift card in it for Starbucks, since he seems to like coffee.
Please let me know if this question is out of scope or inappropriate. Thanks!