Most creative thing for extra cash flow in MF rental?

[Kyle Cortez]

Just reviving an old forum and am hoping to hear some new ideas. 

Everyone already knows the basics such as coin-laundry (I already do for an extra $75-100/month), furnishing apartments, etc. What else have you done to make a few extra bucks every month? 

I personally added a quarter-candy machine to our laundry room that makes me an extra $5/month in quarters every month. (Don't laugh! That's a couple loads of free laundry!)

Can't wait to hear all of yours!