I'm pretty sure the Swensen's ice cream in Quincy Market is long-closed, but someone else please chime in on that.
If memory serves, Swensen's over-expanded years ago, the US corporation declared bankruptcy, and most if not all of the corporate/franchised stores closed down. The original is still open in San Francisco in the Russian Hill neighborhood, I think is still owned by the original family, and is a great place to visit. Swiss Orange Chip flavor is my favorite.
There are also a lot of international franchises still using the name, but I've never visited any.