Nope. But I got the decade wrong. She visited her first grocery store
in 1957, not in the 1960's.
https://blogs.weta.org/boundarystones/2013/05/20/queen-aisle-4
"So, imagine you are doing your Saturday afternoon grocery shopping at
the local supermarket. All of a sudden a motorcade pulls up. Out pops
the Queen of England and the royal prince. They walk into the store and
begin to wander the aisles, indulging in the free samples and chatting
with customers. After a few minutes they exit the store, get back in
their limo and drive off.
Seems pretty far fetched, right? Well, maybe so, but that is exactly
what patrons at the (aptly named) Queenstown Giant Food store in West
Hyattsville experienced in October 1957.
Queen Elizabeth II and Prince Phillip had come to the United States to
take part in the 350th Anniversary celebration of the settlement of
Jamestown, Virginia – the first permanent English settlement in America.
(Nice of them to come, considering the subsequent unpleasantness, which
resulted in the American Revolution… but I digress.) After the
festivities, they traveled to Washington, D.C. to stay with President
Eisenhower at the White House and, it seems, experience a little Americana."
Jill