You and three friends can enjoy wine tasting right in the suburbs of DC!  The Winery at Olney brings its working winery to an upscale urban setting and offers 30 varieties of wine made from grapes imported from such locations as Napa Valley, Chile and Tuscany. 

From the website:  All of our wide variety of wines are fermented on-site at our location in the Fair Hill Shopping Center in Olney, where our customers can enjoy them at our signature tasting bar, by the glass in one of our cool seating areas, or purchase them to go.  If there is one that you find to be exceptionally delicious, we can help you make your own custom batch of wine (28-30 bottles) in our U-Vint area.  Our full-time graphic artist will even work with you to craft your own personalized label!