This weekend was perfect, and included the following awesome things (all highly recommended):
Long lines for interesting art exhibits.
No lines for other, also interesting exhibits.
A much-needed and very pleasant happy-hour park sit.
Not shown: a very indulgent brunch, many bike rides, dinner in unfamiliar territory, and an incredible nighttime exhibit playing at the Hirshhorn right now. We stayed for about 45 minutes, which was the length of the show, but could watch it many times over (and probably will, to be honest).