I'll second the hard cider. For those former beer drinkers who think it is too sweet, you just need to find a drier one - try looking for Magner's. My husband - who is NOT paleo - has started to prefer MY cider to HIS beer - now half the time when I feel like having one, we are out because of him.
And if I occasionally feel like the hard stuff I am going for a really fine gold or dark rum. Something good enough to sip straight with just some lime and/or maybe a good bitters. No Coca Cola (sigh) - there's my paleo sacrifice I guess. Even if rum DOES come from sugar cane - in for a penny, in for a pound.