Participants are encouraged to pull out their prom finest when they show up on Aug. 27 for the seventh annual Black Tie Black Leather Affair at Okoboji Classic Cars in Milford. The annual Shayla Bee Fund event generated approximately $170,000 and serves as the local children charity’s largest fundraising event. This year’s evening will include appetizers, dinner, both a live and silent auction, as well as live music from The Big Throwdown — returning for a second straight year.