In the pilot for Three's Company, it's established that Jack prior to living with Janet and Chrissy stayed at the YMCA.

Supposedly, not every YMCA these days has its housing units directly connected to the gyms in question. More common nowadays, they've got off-site housing that is represented by the respective Y community network of the area. The same is done for their various 'Y Camps' for kids during the summer, as well as any other extras the program may offer in your area.

I heard that some YMCA's (like a few in New York City) still do provide guest housing at their facilities along with their extracurricular programs like swimming.

In the pilot for Three's Company, it's established that Jack prior to living with Janet and Chrissy stayed at the YMCA.

Supposedly, not every YMCA these days has its housing units directly connected to the gyms in question. More common nowadays, they've got off-site housing that is represented by the respective Y community network of the area. The same is done for their various 'Y Camps' for kids during the summer, as well as any other extras the program may offer in your area.

I heard that some YMCA's (like a few in New York City) still do provide guest housing at their facilities along with their extracurricular programs like swimming.

Interesting topic. Out of curiosity I googled the YMCAs for Los Angeles, and it looks like the only Y housing program for young men still in business is in Glendale, CA. Like you said, most of the existing Y's in that area are just gyms now.

I went to a YMCA as a little kid during the end of TC's run and they NEVER had housing so maybe this was done only at a few locations in CA or something.