SHORT VERSION Mix 2 oz fresh pink grapefruit juice, 0.5 oz lime juice, and 0.5 oz agave syrup over ice in a salt-rimmed glass, then top with grapefruit soda or sparkling water. That is a non-alcoholic paloma in two minutes. In Worcester, deVINE on Pleasant Street sells a $7 canned alcohol-free Paloma with grapefruit, citrus …