So a while ago I've been scouring for apartments in NB, and some of them were rooms in single-family houses rented as one unit allotted for a certain number of tenants (say, 4-8). However, in many of these arrangements, the tenants often used dens, living rooms, or attics as bedrooms, despite those not being legally zoned as bedrooms.
It's really pissed me off, since at the time I was on my parents' paycheck, and when they found out I was to be living in an attic with roommates unwilling to really change around where they slept, they sort of had a fit, and in the end they ended up having the upper hand and forcing me to back out of the contract last-second and find a replacement tenant, citing fire safety concerns. It made me extremely distraught how insane they were about the law, or the likelihood of a house fire which could happen in any house regardless of arrangement.
The ordeal was utterly humiliating, and it coaxed my views on housing policy into more YIMBY, "build more + denser housing to solve the cost of living crisis" views. Despite my parents warning me about how hot or cold an attic room could be, it in fact made me want one more than ever. My previous housing arrangement gave me a lot of square footage for the price I paid owing to this (IIRC the room was legally a double or triple), and in that, 2 of my friends slept in the attic, using it as a room. They seemed to get along there really well, handling e.g. heat or cold using fans and space heaters. It felt like such a comforting nook, a shelter from the rest of the house, not to mention a very convenient spot in the house to isolate oneself from parties or activity downstairs.