My wife and I drive by casinos in Maryland to get to Harrington about twice a month. Great games, super friendly staff, good food and not big. Recommend that gamblers in the DC area give Harrington a try and I think they will be pleasantly surprised.
My husband and I went to Harrington Casino and everyone was awesome. There were NO "rude" employees there. They have a really nice atmosphere, great buffet, and a really nice lounge for VIP's - The Black Diamond Lounge. Everything is handicap accessible as well. It is a smaller casino but big on customer service. They have entertainment, i.e. bands and shows all the time.
We will be going back for sure. :))