The Samuel Adams bar in the Greensboro airport is your one place to grab a drink if you have time to burn before a flight. Standard airport bar with decent service and they do have a good selection of Sam Adams brewskis. Besides the usual Boston larger, they had the summer ale as their seasonal and another limited brew.
I ordered the Buckshot - a local amber ale brewed by Natty Greene's Pub & Brewing Co. I liked the flavor of this well balanced ale. At $7.38 for a large pint, all I needed was one before my flight. The Samual Adams bar isn't anything extraordinary. Stop by if you have time before your flight but you can be surprised by the variety they have on offer here.