The Chicago White Sox often offer special events at home games. Here is an example of one:
Hardy Weather Fans
The first 5,000 fans to come to a home game in April when the temperature is below 50 at first pitch will receive an exclusive “Foul Weather Fan” stocking cap from the Sox. These are only available at these April games and will not be sold at the ballpark. The only way you can get one is by proving your cold weather commitment to the White Sox.
Thinking about the event above...