Why would you want to do that. Airbnb is for overnight stays.
There are other websites if you want to rent your property by the hour - depending which country you are in. Have you tried looking on Google @Corey217
Thanks for your reply, @Helen3, I have a 3br house with backyard and back deck. So I do the regular overnight bookings for the rooms, but I have had interest bookings for in the backyard/deck/kitchen alone for afternoon parties (i.e. not overnight, just a few hours). Hence my interest in hourly bookings.
@Corey217 You do realise that parties and events are banned by Airbnb and maximum number of guests is capped at 16? You will find the following link helpful in full explanation.