As far as outdoor festivals on a warm, sunny day go, one item drawing a steady line at Taste of Clayton might have been the ideal combination. A Chesterfield ice cream and gourmet foods store, Frost on the Vine, was selling wine ice cream.

It was cold, creamy — and 5 percent alcohol content. Bobby Watson, one co-owner of Frost on the Vine, has sold the wine ice cream — made by Mercer's, based in upstate New York — for a year. He says "It's the only ice cream that you have to be 21 to eat.”  A pint of the wine ice cream is equal in alcohol content to a glass of wine. It sold Sunday for $2.50 a scoop — and a sign at the booth notified customers that proper identification was required.   The annual Taste of Clayton in Shaw Park raises money for St. Vincent's Ministry to the Poor, Lift for Life and the city's parks foundation.