If you make such a room, I'll go there; I like that sort of writing. But if I'm going to vote, I'd rather not have such a room. I never found these sort of terms all that useful. It's like we make very restrictive rules for the blanket categories SF or F, so that they no longer encompass the field. A lable for the non-classifiable tends to lead a new set of restrictive rules, which leads to new outliers...
"New Weird" is a genre movement. IMO, it's little more than a new name for the New Wave. It's just that the New Wave is no longer new, so we need a new name. And since the New Wave springs straight from a marriage of the pulps with the classics... Well, it's pretty central to my idea of SF/F; so I'd be pretty confused of what goes where.
Magic(al) Realism started out as a movement, too, but it's now pretty much a classification term, and "magic realist writers" are already starting to restrict themselves on what goes into their story.
"Slipstream" is a critical term. It sounds nice but has fairly little positive content. If you have trouble classifying something it goes there. The term's basically a junk yard. If no genre wants your book, here it goes.
I know too little about Interstitial to comment. When I looked like it, it sounded a lot like "Slipstream" understood as a movement, but transcending fiction in other artforms (mostly visual). As I said, though, I know too little about Interstitial to comment.
So basically I'm not enamoured with the idea of such a room because I fear it will help consolidate genre-petrification. Removing and rebrainding the vague and hard to classify stuff leaves Fantasy and Science Fiction with easily identifiable, which I doubt is good for the genre.
Where do I place Jeff Vandermeer? Where do I place Hal Duncan? Get my drift?
But as I said, if this new room is created, and if the sort of fiction I like goes there, then I will follow. And if this actually draws together writers from different directions to play in the same yard, I'm as happy as anyone.
