Smells of cooking or smoking are likely to do so as well.Having said all of the above, the flats I'm familiar with have rented reasonably well at market rents.

Just LOL'ing because I live in the center of the West Loop and even *I* don't feel safe walking around at night after dark :))

The dark side in you is strong! 

They dislike the new tenants in front and have complained about smoking (not allowed) and loud fights.

To add the unit you will most likely need to achieve proper fire rating between shared walls/floors/ceilings and have interconnected smoke detectors.

I've tried it and been screwed with it more than once.Bathrooms get semigloss light blue, kitchens get this semigloss light orange/salmon color that we like, living areas get a light gray that doesn't fade easily.Over time, you see the white oil paint, anywhere it's in the dark and not exposed to sunlight , with yellow and darken.

He had smoke detectors in all rental houses.

I use dark walnut stain for easy touch-up when required.

Requiring renter's insurance (separate from your property insurance) is also very important since they typically would not have the cash reserves to pay for a major damage such as water damage, ruined floors, fire/smoke damage, and you will be sued by 3rd parties if something happens to them while at the house if they have to go to the ER. 

The device also detects smoke and has saved a couple hosts from a smoke filled and smelly STR.