There are a bunch of them around here, honestly probably more than I could count. They are a good way to meet people with a fondness for a similar hobby. But you're right, they are not for everyone.
I went wheeling with a few early on. What I noticed is that most of the folks were more interested in standing around and showing off their jeep. They'd meet at the trailhead at 10 am, stand around and talk and sip coffee. By the time they were done showing off it was damn near noon before anyone began to air down and think about the trail.
Thankfully I got involved with some folks who are a bit more technical and like to hit the road at 6am to beat any other group who has the same idea that day.