A term named after the song "The Room Where it Happens" in the musical Hamilton. This term is used by few but basically means, your moms bedroom, the living room, etc. Can also be used in it's original context of " I wish I was there when it happened. "
" Dude, last night I was in the room where it happens. "
" Fuckin' epic, dude. "
Aaron Burr wants to be in the Room Where it happens
A situation where important new developments are taking place secretly. Only (relatively) important people are allowed into the "room".
When I visited the SpaceX headquarters Musk and the lead researchers showed me the room where it happens.