Keep in mind neither Zebulon nor Sierra Nevada are in Asheville.
Zebulon is in Weaverville about 15 min or so North. Sierra Nevada is in Mills River and is about 30 min South. I think Zebulon is only opened on Friday and Saturday so call to be sure before you go.
Looks like the list left out in Asheville:
Catawba, Asheville Brewing, Archetype, Sweeten Creek (great sandwiches), Ben's Tune Up, French Broad, Ginger's Revenge, Highland, Oysterhouse, Twin Leaf, UpCountry, and Zillicoah