You have hit upon something that Airbnb is currently working on.
If you have used it recently, you might have been invited to the "closed, private beta" options that have been around.
This is for hosts to offer "experiences" in the cities you are visiting.
https://www.airbnb.com/city-hosts
That was running for a few months or so, but is now closed. I expect the announcement will probably come at the AirBNB Open this year!!
#ao2016 #airbnb2016