Spend more time at university, make a social network, and do what your friends are doing. Universities have whole departments around student life. Creating activities for students. Leverage that.
Make friends with the 30+s at your board game shops. Having a social network is healthy, your not marrying them
Your in NYC, there is a literal uncountable number of things to do there. Don't try to make perfect friends. Make any friends. Don't worry about age, focus on shared interest.