Brooklyn Superhero Supply Co.
It does sound like the place where Batman might replenish his utility belt and perhaps he could. Or maybe this is the place where superheroes are born, where they can gather the things they need to make their own custom costumes and gear. The storefront is a sufficient reason to visit - in newsletter style, the attributes of the business are advertised. "Dastardly plots will be foiled. Special programs for telepaths. Ever vigilant, ever true."