Gloryholes are everywhere! Google the name of the city you live in with the word glory hole and you should come up with heaps of information. They are mainly in public toilets. There is a good one that I visit in a park on the way home from work. It is mainly frequented by guys but more couples are beginning to come along. You can also often find them in the video booths at adult book shops as well. Mainly guys and couples again and sometimes women.

Best of luck with your search and let me know if you have any glory hole experiences.