How to play
OFC is very different from normal Poker and some would even argue that it is not Poker at all. You play three hands and try to make the first stronger than the second and the second stronger than the third. For the detailed rules look here. I play pineapple and it is rare to even see non-pineapple played.
Why you should play OFC
You don't have any betting or raising so the psychological aspect of poker is completely missing. All you do is play a game of chance and counting cards and hope you are doing better than your opponent. This is also part of the reason why it never had a great breakthrough: Poker Veterans like Berry Greenstein argued that you could program a computer to play perfect OFC and beat any human over time. He might be right, but it is still really fun laying out a strategy and having to adept it while the game is going on.
Well so far I haven't really argued for but against playing OFC, but let me give you an almost unbeatable upside: You can play OFC Poker for free! I know 'duh, you can play Poker for play money' but anyone who ever played poker knows how awful play money games are. Since you don't have any betting in OFC and just play for points it does not really influence the game, sure people might play safer and you are to a degree adapting to the strength of your opponents hand. But I still run the very same strategy for play money as for real money. There is not really a thing like a bad beat, at least it isn't that meaningful, usually the low-class players don't even know how to build a solid hand in the first place.
Places to play OFC Poker
PPPoker
PPPoker is play money only but I really like the interface especially for Fantasy Land. You can play without registering, just download the app (windows version available) and try out the game, there are about 50 players on at any given time so it is no problem to find a game.
CoinPoker
At CoinPoker you can play for real money, crypto to be exact. The OFC player base of that site is pretty scarce, that is why I am trying to get new people to play with this article :). Still there is at least one opponent on the 5 cent to 50 cent a point level, which is all I need actually.
The crypto transfer to this site is pretty fishy, you have to enter the amount and then a temporary adress is created. Your Bitcoin also gets instantly converted into Tether. Everything worked fine for my 22$ Deposit, but I wouldn't trust this site further than I can throw it. The GUI is also far worse than the PPPoker one.
I had to search for quite some time to find these sites, do you have any better place to play OFC? Let me know if you wanna join the tables, I might tell a few tricks of mine in private ;).