Eat breakfast. Talk about and look at cars. Snap a few pictures. Go home.
Incase you're wondering: It's not a hooligan tear around the streets meet. I save that kind of driving for the track, or at the very least when by myself and not in a convoy near one of the most famous petrolhead meet locations in the UK
I've set up ace breakfast meets 5 or 6 times in the past and they've always gone well enough.