What’s a proper party without the right accoutrements? Be picky with the invites. Nix those tacky crepe umbrellas. And don’t even think about serving deli ice-in-a-bag. Polish the glasses and slice some limes: You’re serving up cubes made in Fred’s guitar ice trays. Just fill ’em and freeze ’em, and in a few hours, you’ll have ice to entice even the coldest guest.