Everyone is going to have passions. Passions aren't critical. And dancing with someone you see once at a Meetup who never shows up again isn't how you make a community.
Eating is critical. Everyone needs food. That's why cultures and subcultures all have their unique cuisine. When you eat in a group it's almost inevitable that socialization happens. You gotta delineate from micro (you) and macro (the entire community) factors. No one's saying you cannot dance.