Either one will fit the vibe. As nuandroids is still finalizing a space, it will be more warehouse -like as their shows have tended to be pop ups at literally commercial/industrial buildings at times.

Flash is great for dancing and has wonderful sound quality. I often go without caring who is playing.

Echostage is more mainstream but still excellent.

You may also want to see what might be at Soundcheck

Opinion of a geographer: if you make two divisions, the cascade crest should be the division between east and west, but I like the concept of an eastern, central, and west Washington. I can't help but wonder, if you're going to make the divisions though, could that third division be better used to highlight another part of the state with more distinction from the rest than the difference the near east side of the Cascades had from the rest of the eastern state. Eg: east and west and Spokane region is third division? East and West but Seattle metro and the islands get the third division?

The all plant based, gingerbread-house-like installations of famous DC landmarks located in the botanic garden are nice and near the capitol Christmas tree.

There are several holiday markets around the city, one downtown on the street south of the portrait gallery.