This subject has troubling me a lot, too, these past days but your comments about Major Briggs may have given me the key / opened my eyes (David Lynch has no idea himself, so it's up to each and everyone's personal interpretation).
First of all, the reference is to a "lodge" of which we see many in Twin Peaks. A "lodge" in its literal interpretation doesn't look like a room with red drapes.
In the prequel movie we see the (malevolent or indifferent) spirits in an actual lodge, which yet is morphing into the Red Room at the end of every scene (including the one where Laura enters the "picture frame" and arrives in the "lodge").
Except for the "waiting room" (somewhat neutral ground?) there is no other place in the Black Lodge where Coop encounters the benevolent spirits, that is the Giant and the elderly waiter.
Windom Earle explains to Leo how the spirits of the Black Lodge have somehow overpowered the spirits of the White Lodge - I'd say what we see in the prequel movie is the malevolent / indifferent spirits "moving in". Mike shouts "Garmonbozia" and makes a comment about the table as he seems to take notice / examine it for the first time.
Or in simpler language: The White Lodge was transformed into the "waiting room" of the Black Lodge (maybe it couldn't be absorbed into the Black Lodge with some positive energy remaining - thus the benevolent spirits can still manifest themselves there. Hopefully one day the opposite will happen where the Black Lodge will undergo transformation into the "waiting room" of the White Lodge with the universal constant applied: Expansion and Retraction, Yin and Yang).
So where is the White Lodge or - more precise - where do the benevolent spirits dwell after they have been "evicted"?
"The Owls are not what they seem", "There are owls (spirits) in the roadhouse" (log lady). I'm not saying they now dwell in the roadhouse but owls live in the forest and my two cents are that's where the current White Lodge is located (thus explaining Major Briggs sitting in a stone chair surrounded by flora).
Other opinions / interpretations are most welcome.