Drummed together quite a few friends some time ago and convinced them to sign up for a 5x5k relay run, the biggest running event in Northern Europe. 70.000 people running. Not all of them were my friends, though.
But we did get 6 teams together, and in reasonable shape. Counting cheerleaders about 45 of us went and had a sweaty and enjoyable evening, probably the last summer-ish one this year.
If you like looking at people running and cheering, this site has some pictures of me and people I know doing just that. Specifically, here's me running like the wind. Or a slow breeze, at least.
And here: trying to dress like someone who runs fast.