looking for an events calendar with hourly booking ability and paypal gateway

Could someone please steer me towards a solution for our site?

I need to be able to manage resources (rooms)- folks internal to the organization need to be able to see if a room is occupied or available, and need to be able to reserve that room.

We also need a booking system to include online purchase of classes and events. The system should let the organizer know when a ticket is purchased, and who bought it, preferably their email address.

It would be great if one component did both things.

So, a customer can look at the website calendar and purchase a class right from there. The organizer of the class should get an email about this, the customer should get an email about this. The customer should be able to add the event to their calendar right from there.

Meanwhile, one of our practitioners should be able to look at the website calendar and see if the meeting room is available on Tuesday at 10 am. They should be able to reserve the room so that other practitioners can see it is reserved.

I hope this makes sense. Thank you in advance.