How do you solve the cold start problem? I will not promote

So I'm building a platform where users can join and host local and spontaneous coworking sessions, aimed at solving loneliness among remote workers and other WFH fields. Thing is, I'm facing the typical cold start problem. People hear the idea - > Excited, they sign up - > They see that there aren't any events near them - > They log off. How do I break this cycle? I've tried hosting myself but while people show up, they usually just come for that one event and are gone. Not really sustainable. Any tips or advice would be appreciated 🙏