Shake Shack has a branch on F and 9th, not far from L'Enfant where the bike van was stationed, so I headed up there. After wrestling with the bike return in the heat I was exhausted and had to sit on the windowsill gulping water for about 10 minutes before I felt able to order!
I felt I ought to do justice to the place by ordering the classic and a shake (the Black and White). The burger was pretty tasty, though I would have liked the vegie version more; fries were good and sauces free-flowing, always a plus. The shake was rich and sweet and filling; I discovered later that this combo contains more calories than I need per day which explains why I didn't want any dinner later on!
Verdict: good burger, would have the vegie next time and skip the shake