Let me help in making this a little more interesting too. Maybe we could organize a group lunch and tour at the World Bank as well. (tour is free but sorry, no such thing as a free lunch!) Not guaranteed I will always be here (darn consultant contracts) but with a list of names, we could arrange visitor passes.
Other activities could also include:
monument tours (for those who visit from outside)
Dinner cruise on Potomac or afternoon brunch at Sequioa in Georgetown.
Just my 2 thoughts worth.
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"Fly me to the moon and let me earn alot of miles."