The Wydown on H allows seating in the building lobby, which is a slept on good option for working and drinking, has a nice living room vibe!

A few recommendations are Open City, Tryst, Pitango, and Coupe – one theme here is that the Tryst family of locations all prioritize a wide array of seating. There does tend to be an inverse relationship between the number of seats and the quality of coffee, but I don't think that's particular to DC. Some hit-or-miss spots seating-wise are the two Emissary locations and TCB, both serve good coffee but are in high demand.