The old adage, "this is how it has always been done," doesn't cut the mustard. It wasn't acceptable for Jim Crow segregation nor was it admissible for the old boys club in keeping women out. Similarly, custom and/or "treasured" traditions involving food are not moral justifications for causing animals suffering and death.
I’ve come to realize that as much as vegans may dread activities that have us being surrounded by animal oppression and exploitation, sometimes just by being there we can be agents for mindfulness and change. Some interactions we have with others may be confrontational and some may not, and some may go better than expected with people who are genuinely interested in aligning their values with their behaviors—not just saying they care about animals but backing it up with ethical deeds. It may often be awkward or socially suicidal to talk about what people are eating while they’re eating it but it is, nonetheless, imperative. We should not shy away from interactions simply because people may become uneasy. We would not pacify someone who causes a child or a cat to suffer, so why do we want to make those who abuse farm animals feel comfortable?
In the end, the possibility of changing minds and behaviors regarding animal consumption is not possible without connections and conversations. Our presence alone invites others to become more aware of farm animals and, perhaps, to question their own participation in animal suffering. Who knows, you may stumble upon that one person who has been meaning to go vegan for some time but just didn’t know where to start. And then they met you!