Currently, I have not had any prospects come directly from Pinterest. However, I believe in keeping the name of the property in a good spotlight as much as possible.
I don't believe Pinterest has my particular demographic, but they talk. Word of mouth is very important, especially in my market area. I'm not in a small town, but it's not a big city, either.
Someone might ask "Do you know a good apartment complex?" If they have seen me on Pinterest, there's the word of mouth referral.
I have also started putting my property name in the "City" space on my Craigslist ad, just so my name is seen more often.
It takes a while to build a good reputation and these are great places to get your name out there.