Workshop attire is business casual. For men, this could be khakis and button-front shirts. Neckties are optional. For women, this means separates, not suits. Jeans are fine. Layers might be good, since the conference room may be chilly. Or warm. It’s hard to say.
DC weather in mid-September is generally pleasant, with high temperatures around 80F/27C, and low temperatures around 63F/17C.
NOTE ABOUT MONDAY 14 SEPTEMBER: we will be going straight from BLS to take a walking tour of one of DC’s neighborhoods. Please be sure you have comfortable walking shoes with you during the day. There will NOT be time to return to the hotel before the tour begins.