Starbucks offer free coffee grounds to gardeners with their Grounds for Your Garden Program!
Stop by your local participating Starbucks and pick up a free pre-packaged bag of used coffee grounds to enrich your gardens and compost! These bags can usually be found in a bin or container near the entrance of the store. *Note: Pre-packaged bags of Grounds for Your Garden may not be available in all stores, so be sure to check with your barista or call ahead.
Visit the linked page for more details.