It was part of the Free Fun Fridays which are sponsored by a Massachusetts charity. Ten Fridays starting the last week of June, 10 different venues throughout the state each week. The Cape Ann Museum Free Fun Friday has come and gone. Try again next year. In the meantime, there are lots of other wonderful places still scheduled to be free. Go to HighlandStreet.org for info.
Definitely an entry fee... No mention of free days, though there is free entry for members of some other organizations as well as active duty military. https://www.capeannmuseum.org/visit/hours-and-admission/
I don't remember an entrance fee at all. Check their website?
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