>Is it still in use anywhere in the US?

Etymology: Chautauqua Lake
Date: 1873
: an institution that flourished in the late 19th and early 20th centuries
providing popular education combined with entertainment in the form of
lectures, concerts, and plays often presented outdoors or in a tent [M-W10]

...and it has made a BIG comeback in the late 20th C (in no small part due to Pirsig).