I would recommend that whenever you are serving shrimp, that you either serve it on a bed of ice or in some sort of chillable serving platter - or - only put out a few and keep the rest in the refrigerator to replenish the serving platter
Tangy Shrimp Appetizer Skewers
Makes 3 dozen
Adapted from "Cooking in Style The Costco Way"
36 cooked medium shrimp with tails intact
36 cherry tomatoes
36 ripe olives, drained
1 tablespoon prepared light Caesar salad dressing
8 ounces fresh mozzarella cheese, cut into 36 pieces
36 small basil leaves
36 4-inch-long cocktail picks
In a large bowl, combine shrimp, tomatoes, olives, and dressing, tossing well. At this point, the mixture can be covered and refrigerated for up to 24 hours.
Skewer 1 shrimp, 1 tomato, 1 basil leaf, 1 piece of cheese, and 1 olive on each cocktail pick. Arrange on a serving platter.
Serve immediately or cover and refrigerate for up to 2 hours.