Joined some D&D friends and pkayed a handful of times. I had fun, but it was more from just hanging out with friends.
As for SCA type activity;
In college, one of my buddies was heavily into D&D as well as martial arts, and my roommate and I ran a martial arts club on campus and this buddy, Jason, would occasionally come and train with us.
One day, my roommate Tim and I were doing some weapons training and light sparring with 7' rattan staffs, and Jason says,
"Hey, you guys should come check out the Lil Squishy club"
"The what?...."
"Oh, it's an offshoot of the D&D club. They made a bunch of padded weapons from PVC and foam and we spar and have battles and stuff. You guys should really check it out, since y'all do weapons training/sparring and all. We meet up at XX Hall every Friday".
So we decided to give it a go. Turns out Jason was busy that Friday, so he said, "Just go ahead and tell them I know you guys"
We check it out, show them that we understand the concept of control and light contact weapons sparring and join in.
The following week, Jason joins our MA training session and says, "Uhhh... so... the Lil Squishy guys would prefer you not join them anymore, and I'm on suspension from the club for inviting you. They cussed me out for inviting real martial artists to join in. I guess the 2 brothers who started it were embarrassed by how easily you defeated them. BTW, that dark haired girl I heard was sitting on your lap most of the night? That was the younger brother's GF".
Whoops.