The difference between sharing limited spectrum and AP resources in a room and only sharing limited spectrum resources in a room are not a fundamentally different problems. In addition you'd have loads of noisy neighbors, at least everyone close by in the room.

I agree the phone ought to be plugged in anyway. Even if it could survive a full day of being your workstation, you wouldn't want a half dead or worse battery at the end of your work day, and regularly draining a significant amount while stationary unnecessarily shortens the total battery lifespan. In addition, if docked into something with a bit of active cooling, the phone could perform better and once again preserve the battery.