I have a Marshall amp corner in my living room where I have my 1959HW full stack, JCM 900 and JVM410 with a shared Marshall 4x12. In front of these I have an area that has one of a JTM 45, Origin 50C with extension cab, or Eng Artist edition with two Engl 2x12 cabs, or a three tier keyboard stand for synths and a line mixer when I use my old school wakeman keyboard rig.
To the left of this Marshall amp corner, I have a Crumar Mojo Suitcase organ with Hammond 30-note pedals and bench, and a Korg GrandStage X. which are part of the wakeman keyboard rig.
To the left of that I have a Yamaha Montage M8x on a rolling keyboard stand (or a Roland Fantom EX 6 that's usually in case; to make my modern rudess keyboard rig); behind M8x, I have a shelf with: a Bogner Helios Eclipse with a speaker cable to a Marshall 4x12 in the Marshall corner; a JP-2C and pair of Mesa Compact 2x12 cabs; a Diezel VHX with speaker cables to connect to the Mesa cabs. to the right of this shelf is a Marshall DSL40CR on an amp stand.
I have painters tape notes over my amp heads' inputs if they don't have speaker cabs attached to avoid accidents.
To the right of my Marshall corner is a computer desk with nearfield studio monitors, and a pair of powered 8" PA cabs I use for modelers.
To the right of my desk is a Vox Continental 61 key stage organ, with a 61 key MIDI keyboard to approximate a Super Continental, it has a dedicated Universal Audio Ruby (Vox amp simulator) and Eventide H9.
To the right of the Vox, I have a Hammond A-3 with 30 note pedals..
To the right of the A-3, I have a table with a mixer, and several semi modular synths including a Behringer 2600, Poly-D, Odyssey and modular System 55. Under the table I have a pair of powered 18" subs...above the table I have 2 sets of powered PA cabs, 2 2x10s, and 2 2x15s, with a three piece samurai sword set on a stand (katana, wakizashi, tanto) in between the left and right cabs.
Other gear is in my bedroom and my son's room. I can basically get to most things I use most often easily; things I use less often, just need a few things to be moved. Things I use less frequently are on shelves or in cases, and take a little more effort to make room to use.
I'm out of space and surrounded by gear.