alt Hacker NewsQuite right. However, if your wifi bridge has an option for auto tuning the power then that might be a future proofing option, assuming that everyone uses it, which they probably won't sigh
If wifi becomes a pain within a shared building then seriously consider ethernet. Slimline stick on trunking will hide the wires at about £1-2/m. A box of CAT6, solid core is less than £1/m. You will also need some back boxes, modules and face plates (~£2.50 each) and a POST tool (fiver?) Or you can try and bodge RJ45 plugs onto the solid core CAT6 - please don't unless you really know what you are doing: it looks messy and is seriously prone to weird failures.
‘High power’ on a router is mostly useful to borderline clients. Without that, they likely won’t even be able to see it. It’s hard to auto detect that situation initially, since how can you tell someone you can’t hear to get louder?