Mary Barrett Costello has restaurants in her blood: Her late father, Frank, opened Barrett’s on the waterfront in Charlestown 40 years ago, and had several other eateries. Costello, along with partners, owns Abington Ale House and other restaurants south of Boston, plus Plymouth Bay Catering. But her real love is horror, and for 22 years, she has operated Barrett’s Haunted Mansion, behind the Ale House, during the Halloween season. Costello, a 60-year-old grandmother, spoke to the Globe about her interest in zombies and things that go bump in the night.
Is Scary Mary’s house really haunted?
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