They have parking onsite as well as garages that are like a 5m walk. You should probably use Parking Panda tho cuz it can get expensive
I'd suggest L'Enfant Plaza, for parking. It's reasonably close, but also very capacious, so the time saved looking for closer parking will generally ought weight a slightly longer walk.
Yes, I was able to find parking the night of the show. It was roughly a little under a half mile away so nothing that bad. It was a Tuesday night so if you're going on a weekend I'd plan accordingly.
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