There's a world of difference between being excluded because you are of a certain gender, religion, ethnicity or sexual orientation and because you don't like a certain beverage. Hey, I don't like the naive techno-optimist prevalent in many technology events, but that doesn't in any way make me excluded. It just means I might have a different attitude and hold a minority opinion compared to my peers, and that I find…
An analogy would be a conference where the evenings entertainment is a competition to see who can piss up a wall the highest. It wouldn't exclude women per se, because they don't have to join in if they don't want to, but you can reasonably see why they might not feel welcome, and why they might complain about it. If a conference wants to appeal to a broad range of people it's the organisers job to make sure the entertainment isn't based around one thing that only appeals to one group, even if that group is a majority.