I think most of the GHs these days are private, set up in someone's home or apartment. I know the scene in my city of 4. million well, and I can point to only one place that has actual GHs.

But delve into double list.com, and you'll find a good number of private GHs listed every day.

cruisingforsex.com has a pretty good list of GH locations world wide. Mostly a gay site, but a manager of an ABS clued me in on that site.

This site has some good listings too. I use this one and the one above when I'm traveling.

Nothing is 100%, but these give a good start.

I always hit cruisingforsex when traveling alone. It's the only way I know to find the holes (or theaters, or whatever your favorite cock-sucking scenario may be).

Search Resources for Glory Holes
 

I use cruisingforsex.com It is an older site and was real quiet for a long time but is now getting more active with the demise of CL

Also try address4sex.com There are detailed listings and descriptions.

Another is Men4sex.com which is part of the cruisingforsex family of sites. Also has detailed info on GH. I have posted a lot of info for NW Arizona in all three. The sites seem to be good nationwide