The Gentleman's Study, that's what.
Once upon a time, a gentleman's study was his lair. Book-lined walls, a rack for pipes and a clear desk except for a working manuscript and a couple of eccentric souvenirs from foreign travels. Now? It's a knot of cables maintaining various aspects of technology, a stack of unopened parcels from amazon and a short pile of correspondence to be maintained.
Yep, The Gentleman's Study, that's what.
(Inspired by Cultural Offering)