ESPN Zone is another one of the places we went to when I was in Washington DC. It had a big arcade floor where we spent most of the time. There were sports games like air hockey, and games where you got to do the work, like a river rafting game where you sat in a big metal raft and paddled with a oar to control the oar and raft in the game. We got a card with 60 credits to use, and you could buy more if you wanted to.
Here is the link to the website.
http://espnzone.com/washingtondc/
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