I compost coffee grounds. Also, coffee grounds are actually very adsorbent and can come in handy. For example, if you want to get excess bacon grease out of your cast iron skillet without taking off the seasoning, put a cup of coffee grounds in and use a paper towel. That will do a great job cleaning it up. Just rinse afterwards unless you want the coffee flavor.
Also, if you ever get a sting from a wasp or bee, quickly apply some coffee grounds to the site.
2016 Wildwood 195BH
2009 Silverado 1500