I can't see them being able to enforce a complete ban
Ex. I have a "room-mate" (i.e. "lover") who splits the rent out of her
paycheck. Who's to say if we're "live-in lovers" or just regular
platonic roommates in the sense that faraz is probably speaking of? In
fact, she lives there with her 3 kids (and I have 5 myself) but the
condo is in my name. In fact, I could be involved in a 4-way
relationship with 2 other guys and a girl who all live there (and maybe
have their kids there) and would naturally share expenses. I can't see
how they'd be able to enforce any ban against me having my lovers living
with me even if we're not married (and thus not related) so how can they
say "those aren't lovers, they're only roommates in the totally platonic
sense of the word"?
I don't even think the city can restrict the number of non-related
people living there (unless it's obvious you're running some sort of a
boarding house) but I'm sure they CAN restrict the total # living in a
single dwelling based on size/number of bedrooms (i.e. if you have 2
bedrooms and there's a male and female child as well as male and female
adults, they might be able to restrict that based on either the two
children would have to share one room or would be sharing a room with an
adult of the opposite sex. The only other option would be "male adult
with male child" and "female adult with female child" and that would
definitely show the adults really are just roommates and not lovers.)