I shall be in DC soon (17th July) for 10 days (for our honeymoon ).

My adoring other half has allowed me a day for gaming so I shall be dragging an assortment of Thrones, Netrunner and Cthulhu decks with me.

I suspect this is not a gaming day allowance, more a chance to go shopping in DC without having to drag me around

What days are good to catch a lot of people in one place, and where is that place?