Frozen palomas.
Pick up some tequila, orange liqueur, and grapefruit juice.
Mix it like a margarita (a paloma is just a margarita with grapefruit subbed for lime), then put it in a shallow pan, cover with plastic wrap (to avoid picking up freezer flavor), and freeze it.
It has alcohol so it won't freeze all the way, it will just get slushy. Depending on how slushy, you can either scrape/spoon it into glasses, or if it's harder than that, blend it just a bit, to the consistency of a frozen margarita.
You probably don't have margarita glasses, so use heavy tumblers--maybe DH's scotch glasses. Pour coarse salt on a plate. Add just a pinch of sugar. Wet the rim of each glass with a squeeze of citrus or just a bit of the grapefruit juice, and salt the rim. Serve it up.