Exactly the opposite of the AR/Dyna listening rooms in the '60s.
You just sat and listened. No one tried to sell you anything.

And they stayed open for how long...?

Duh!!! I said "listening room." Do you know what a listening room is?

There were two of them, one in Grand Central Station, and the other on Sixth
Avenue (I think). THEY WERE NOT RETAIL STORES. The idea was to give listeners a
quiet environment, free of sales pressure, for them to experience AR products
without competition from other products.

I think they were open about a decade.