Those 3 & 4 way boards would make for a wild chess game! That would be interesting I bet.
I played at a club for a couple years around 20 years ago. Clubs will be pretty laid back for non-rated games - but if the games are being rated, then not so laid back, at least if you want to win (you have to join the USCF to be rated). If you don't mind losing in 36 moves to a 13 year old kid goofing off & eating potato chips while he's kicking your a$$ (the state champ elementary school team played at my club), then it won't be too stressful.
Big tournaments had cash prizes, & were tough - it is hard work to concentrate (at least as hard as I had to) that hard for 3 days of a tournament. If you can think ahead seeing the best line 8,9,10 or even 11 moves ahead (Kasparov says he thinks ahead 12-14 moves at times), you have a chance at being really good, and it helps if you can memorize thousands of opening variations, and see some possibilities in some of them (if you can do the one, you can probably do the other!).
Back then they were just stating to make good computer chess machines, they had great knowledge of the openings, but were beatable if you could take them to the endgame. Now obviously they are a lot better - I thought it was impossible for Deep Blue (or any computer) to beat the World Champ in my lifetime. I still don't understand how programmers came up with an algorythm to allow a supercomputer to beat the best human. I think they must have taught it how to play chess, and then allowed it to teach itself. None of the programmers or consultants were good enough to beat the champ, so the machine must have taught itself. Kind of discomforting to realize that machines can now not only process information faster, but they can just plain think better too, isn't it?
I think it is like a lot of things, most people can get pretty good if they practice a lot and work hard, but you have to be gifted to even have a chance to become even a master (not to mention Grandmaster). A great game to hone your concentration skills. I don't play much anymore.
adding a link about big blue vs. kasparov & chess programming
http://www.maa.org/mathland/mathland1.html