There are two free chargers at my gym and two more at a local grocery store. There is also free charging at the Performing Arts Garage in SF, plus you get to park right next to the exit which is a huge extra (oddly they only have half as many chargers as they do spaces, but it's still a great parking location).
And then of course the EVGO fast chargers are free this year through the Charge Now program and I think the ChargePoint/BMW/VW fast chargers will also be free for i3 owners for at least a limited time, though not certain of that.
Yes, there are definitely perks. Enjoy them while they last as no matter whether EVs are successful, or a fad, the freebies will fade away.