 Mahaffey Vendor Fair and Chili Cook-Off. Now, that'll be on Saturday, 11 a.m. till 5 at the Mahaffey Scout Park. There will be a bouncy house, a slide, many activities for the kids. There's a kid's hair cut-a-thon. And don't forget about the Chili Cook-Off. That registration, that gets underway at 10 a.m.