Hi pal, have you tried 豆瓣? there are some offline activities, but maybe you should focus on one or two interests and people who have same interest get together you may join in. BTW I love exploring new food spots, we may hang out to find tasty food if you want.
I would love to hangout. I will keep you posted. Once I am back in the city by the end of this month, I will contact you again via this forum if that’s alright and we can set up a place in the city and meetup for a coffee or tea. I see your username is Erika, I assume you’re a woman? We can perhaps go down to Chun Xi Lu.