Allow Room (resource) bookings
"We would potentially need to book an appointment with not only the client (‘employee’) but a room too, does the system have the function for room bookings too? If not I’m guessing the way to do that would be to set the rooms up as ‘employees’. Can you then do a booking for more than one ‘employee’ at a time?"
Currently you could indeed create rooms as "employees" and each room then has its own column each day, so if you had 3 rooms then there would be three columns per day in which bookings could be made. However, you would not know which employee these were booked against, but you could create services such as "massage with Sam" and "massage with Emma"