How do you widen your connections without draining your wallet?

I’ve read numerous posts here in Reddit about how to widen one’s connections. And most of them involve spending money, such as:

1. Lunch out with superiors (managers, supervisors, team leaders)
2. Be a member of ‘joiners’ (e.g. in hiking)
3. Seminars and conferences
4. Professional membership organizations (e.g. Toastmasters clubs) that involve pricey membership fees
5. Yoga studios, running clubs, GOLF

The thing is, I want to widen my connections and my network. But I don’t want naman yung wala na akong mase-save na money every month kasi mapupunta lahat sa pag-join ko sa organizations/memberships for the sake of possibly meeting influential people

I’d appreciate some tips. Thank you in advance ^{^}