Funny enough, just back from a week at Poly CL. Last night during dessert service I witnessed a solo gentleman trying to take and arm full of beers from the beer fridge and he was stopped by a CM saying it was two max per person. He was none too pleased, to put it lightly.
Poly doesn’t stock the beer fridge during the day any more, only 5pm+. It’s by request at other times. I suspect most won’t encounter such rigid enforcement during the self-serve hours, but it’s not outside of the realm of possibility. There were many new to me CM faces around this trip, FWIW.
From a practical perspective, if you’re getting beers for the pool (which should technically be in a plastic cup) there are only so many cups full of beers one can realistically carry out of the lounge, down the stairs or elevator, out to the pool, etc, so you have that to consider as well.
As with many Disney things, YMMV.