You can organize a geocaching event in a location close to your store using a geocaching app provider. Hide your incentives in various places around the area. Give hints to the customers on how to find the incentives (specific geo-coordinates). Make some incentives only work for the first X customers, for example only the first 10 customers. “Hide” various incentives, like 5% off, 10% off coupons, $5 gift cards, free samples, free products, etc. Make the incentives last only that day and redeemable only in your brick-and-mortar store at that location to bring customers to your store.
By making the event an entertaining game, you can get many participants and hopefully some buzz around it. As you place incentives that require a purchase to be redeemed, you can generate new sales. It can help you bring in new customers or re-activate the old ones. This is a great opportunity to show customers how fun your company can be.