You could just make it a 5.1 system and then hook the other 2 speakers up to zone B, place those on either side of your poker table and listen to stereo music when you have the guys over.  They aren't there to listen to quality audio are they? They're there to drink your beer, eat your food and win your money.  BTW, when and where is the game?

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Joe
If you can't have fun doing it, it's probably not worth doing.