Black Walnut Cafe Black Walnut Cafe will be opening their first Georgia location this summer at the intersection of Windward Parkway and Northpoint Parkway in Alpharetta. The contemporary, fast, casual concept features over 100 fresh, made-to-order dishes. They are open seven days a week. Stop in for a quick, early morning coffee, to talk business over lunch or to gather with friends for a late night dinner. Breakfast/brunch is served every weekday until 11:00 am and on weekends and holidays until 4:00 pm.