I previously posted on a story about Busboys and Poets, a coffee house and café in Washington, D.C. that was, I had read, a genuinely racially and ethnically mixed third place.
I am writing from there now, and can testify that it is as lively as I had read. Visually, it is clearly very mixed. I can't tell how much of a third place it is - I can't tell the regulars from the visitors. It is, though, very cosmopolitan. The spirit of Langston Hughes presides. Indeed, the shop takes its name from a title given to Hughes by Vachel Lindsay.
The Gruntleds are using it as a base for visiting with our DC friends all afternoon. This should be good.