Typhoon I was sitting there and could not for the life of me remember the name Fribble.
I didn't remember the name Fribble either, but my wife worked at a Friendly's when she was a teenager. So she gets the credit for remembering Fribble.
I don't think you have any in MA., but Wawa has a milkshake that's not bad (Wawa is like a Cumberland Farms only they make decent subs / sandwiches ect.). They discount them in the summer and call the promotion Siptopia. Not a fan of using a spoon, so I ask them to mix it well. In the Florida summer heat it melts pretty fast anyway.
My grandfather owned his own drug stores his whole working life and the last one he owned before he retired was in Harwich on the Cape. Back then drug stores had a lunch counter which my grandmother ran. They made the best frappes in the world.