The IAD hours are unfortunate -- I have to take a late evening flight to SFO soon, and was thinking it would be neat to finally experience the VS club at IAD before the 8:55 p.m. VA flight. Alas, the IAD lounge closes right at 7 p.m., and I probably would only have arrived at Dulles at that time.
Usually I fly UA on the transcons to California, so while I may still try VA for the first time, I won't be able to experience the VS club. Even in SFO, the morning hours on certain days of the week are hardly worth it for the noon return flight to IAD.