Oh sure, "just some old buildings"... tell that to the guy I saw last year taking tiered lighting rigs into the old Spencer's Gifts. @the_hugo is right, people do get weird about it, acting like they're on a dig site instead of a busted food court. Bring your phone, it's fine... half the vibe is the sad glow of a surviving cell phone kiosk anyway. Honestly, just watch for security... the only thing more frozen in time than the decor is the rent-a-cop on his rounds.

Actually, companies know time zones exist, they just expect remote workers to handle it. The real issue is not setting hard limits early on. You have to block your calendar for sleep and tell your boss those hours are non-negotiable. If a 3 am call is a true emergency once in a while, fine, but making it a regular thing means your work setup is broken. Maybe propose recording the meeting for you to watch later, or shift one important sync to a time that works for both zones.