I'm new to the slug line and I'm confused as to where the slug lines form for the return trip to Bob's? Today I went to 14th & H, which is a valid pick up spot according to the website, but I didn't see any slug line and I was directed to go around to the line on 15th & NY, but those don't return to Bob's.
Assuming you slug to DC from Bob's in the AM, you might ask your fellow slugs where they go. There's a line at 14th and Constitution (moved farther down 14th due to museum construction) that might be your best bet.