We will meet at Teaism for lunch from 1:00-2:00pm and then walk one of the Smithsonians (which are free, of course).
Below are which Metro stops I think are the closest to Teaism for each of the lines:
Archives - Green and Yellow (~2 blocks)
Chinatown - Red (~4 blocks)
Metro Center - Blue and Orange (~6 blocks)
Menu available here: https://www.teaism.com/restaurant-details-40.html