Do you have a BOA credit card? They get free admission to museums the first weekend of every month.
https://about.bankofamerica.com/en/making-an-impact/arts-and-culture#museums-on-us

Their search feature is broken on Firefox, but works on Chrome for me. They used to list the AVMA museum, but that dropped off the list. Now they show:

Reginald F. Lewis Museum of Maryland African American History & Culture