How would you get the first 100 local businesses onto a city-focused social platform? i will not promote

I’ve been working on a platform that’s built specifically for local businesses, but instead of being nationwide, it’s organized by city. Right now I’m focused on Austin, Dallas, and Houston. Business owners can: - Create a business profile - Discover other local businesses - Share updates with the community - Create local events and collect RSVPs The challenge is getting enough businesses to join so the community becomes valuable. I’m avoiding paid ads for now because I’d like to prove there’s genuine deman