I used to commute to the Mall & L'Enfant 3-4 days a week. I would bike to Penn, ride the MARC to Union, and bike to my office (where there was a gym with showers). It was a slog, but I didn't mind it. I had a hotspot and used "working on the train" as an excuse to get in later or leave earlier. (If you ever saw "MARC Public WiFi," that was my hotspot. 😇)

Prior to that, I used to drive to Gaithersburg 4 days a week. That was terrible.