SIRA (Solar Imaging Radio Array): NCA
This is a regular monthly meeting of the National Capital Astronomers. It is free and open to the public. NCA have lectures but there usually isn't any observing. Seating is limited and it's advisable to arrive on time.
National Capital Astronomers The speaker for March is Dr. Robert MacDowall (GSFC). Please see the website for further details. I can provide a ride for anyone from Bethesda Metro.