If you want “real” interest, track revealed behavior, not just vibes. Look at actual spend and time: enrollment and completion rates for Chinese language classes, repeat attendance at cultural events, merch/book purchases, and club retention after the free dumplings run out. Run simple field experiments too-randomize ticket prices or perks (food, workshop credits) and see what moves the needle; RSVP vs. QR check‑ins will expose ghost signups fast. Also segment by stipend/allowance and schedule constraints, or you’ll mistake broke-and-busy for “not interested.”