Being Creative in the Current Airbnb Market

Hello everyone, I have been optimizing listings for people whose listings have dropped in views and bookings. I am trying to think outside of the box, especially for the listings that do not have competitive amenities (for example no pool listing in Tampa.) I saw a listing in Colorado that if you booked with them, they will give you discounted ski lift passes. Is there a special website that offers discounted things for a business owner to offer clients? I think this could be great for those whose listings are less competitive. For my example above, I am looking for a nice public pool nearby that I can offer guests a free daily pass or discounted tickets to Bushe Gardens (guaranteed no matter the season.)The specific listing I am currently working on is one that hosts 16 people on the waterfront so group discounts would apply. My question is how would the host get their hands on a coupon/promo code? This is an example but I would like to do this for my other listings too. 
I would love to hear what you have to say and thanks in advance!