Gloryhole enthusiast here, though as my knees ain't getting any younger (!) I find myself increasingly on the prowl for venues with a split level gloryhole where both feeder and sucker can stand (the feeder platform is up a few steps and the gloryhole is located at waist height for the feeder and head height for the sucker).

Blowbuddies in San Francisco was legendary (closed permanently) and was my first experience of a gloryhole like that, in Easter 2000 (the slurp ramp concept blew my mind so much I can recall when the trip occurred even though it was so long ago!). Swallowed plenty of loads then stepped up onto the feeder side and fed a huge load to a talented mouth whilst another feeder played with my nips and yet another feeder snogged me deep.

Bunker Bar in Gran Canaria's has similarly gone at the time of my last visit (November 2019). Still "normal" gloryholes there though but I miss the split level platform. One of the positions even had a perspex wall!

Ones still (date of my last visit) in existence that I can think of are:

Cruise bar in Gran Canaria (November 2019), two separate individual cabins for the sucker with multiple holes for feeders at each of the sucker cabins.

Dirty Dicks in Amsterdam (July 2020), three individual sucker positions divided by partitions, each with a gloryhole linking to an open feeder platform (easy for feeder to move from one mouth to another).

Steamworks saunas in Seattle (October 2019) and Toronto (September 2019), wide variety of options including open and closed spaces for each of feeders and suckers.

Share your knowledge of other locations and your experiences at them!