What's the most creative way you've seen a local business fill their slow hours?

I've been researching how small businesses combat dead hours, and I'm fascinated by the creative tactics that work. From happy hour extensions to community events, what's the most effective (or most unusual) strategy you've seen a coffee shop, restaurant, or retail store use to drive traffic during their slow periods?

Bonus question: What would make you, as a customer, visit a business during their typically quiet times?