There must be a lot of folks who were hopping mad to see York's Tropical Ice Cream pack up and move south from Washington, D.C., to Broward County. They've probably spent many a lonely, ice-creamless night wondering how to satisfy their jones for rose-flavored ice cream. And those hooked on grapenut, jacknut, cinnamon, tamarind, and lychee or accustomed to a regular fix of papaya, ginseng, or black walnut, not to mention the mild alcoholic fizz from a scoop of Guinness, are likely out of luck too. Their loss is clearly our gain. What we lack in political culture and great art museums, we now more than make up for in soursop, in decadent high-butterfat chocolate chip, and in R-rated rum raisin ice creams. Jamaican proprietor Cal Headley makes the stuff in a Lauderdale Lakes location, trucks it over to the store daily, and sells it for $2.50 a scoop or $5.70 a pint as he doles out sample spoons of the most luxurious fresh banana ice cream from here to Kingston.