Chat about anything
Say you're visiting New York from Los Angeles. You tell everyone in the #newyork chat that you're thinking about coming, and someone tells you where the best place is to stay. You saw earlier in #announcements that there's a party happening the night you fly in. Someone you've been talking to in the #general chat tells you they'll be in town too, so you can direct message him about your plans to meet up. You take photos, videos, and share them with your private group chat of friends back in LA. You meet someone interesting that night at the party. "Let's keep in touch on the chat" he says - didn't even a need a number.