It just takes one person to start a Meet Up thread and a bit of nagging persistence to organise
I think that is what is different to other forums I’ve used. Meetings arising from posting on those tend to be more organic, based on something happening that posters would be doing and which come up during a conversation (someone mentions they are running the Great North Run, others say they will come and cheer, shall we grab dinner later?) or because there’s an event or activity that previous conversations have shown are a shared interest (so a casual invitation is offered (anyone fancy getting tickets for X gig? And that grows into enough interest for a few folk to make a weekend of it). I’ve met people in Las Vegas based on an original interest in scrambling/hiking, people in Paris because someone was in a show there, so on. Mostly no arranging beyond ‘I’ll be at X at such a time Hopefully see some of you there’ and no persistence needed. Sometimes there are two or three people, once 40 of us ( which did take a bit of planning for a restaurant, but not for the rest of the time), usually somewhere in between. Sometimes it’s a quick coffee, sometimes a few days, and often subsets of us do different things or overlapping dates or times. From there, I’ve forged long and deep friendships, with people local and from all round the world, whom I meet up with in addition to forum based stuff.