Rusk said he's trying to repair that image. Longtime staple Mcgilligans IPA continues to be the brewery's bellwether, but the primary reason to swing by the brewery housed in an old horse stable — other than the fact that it's a brewery housed in an old horse stable — is Rusk's passion for sour beers. He tries to have at least one on tap at all times, and at the annual Funk Fest in April, he tapped six of them.