Free ice cream is really good. But Walmart is really, really bad. ARRGHH! It's a dilemma, one you'll have to look into your own heart to resolve.
Free Ice Cream Day is May 30 (Memorial Day weekend, so I'm sure you've got nothing better to do) at your local participating Walmart. You can choose between a few different kinds, one sample per person. Seattleites, looks like the closest participating store is in Federal Way, so that might be a little far to drive for an individual cup of Ben and Jerry's. Or it might not.