the paramaters:
you have:
22 x 22 space
you want:
live recording space
theatre space
control room
vocal booth
What can we do with this?
Firstly, 22 x 22 is not nice to deal with acoustically, and even though you will lose space, you get better acoustic results where room dimensions are not even ratios. So you might as well 'subdivide' it.
One possibilty is:
Build a partition across the room that creates one area of 22 x 13, and another of 22 x 9.
The 22 x 13 are is the live room and theatre. It's narrow, but making it wider eats into the other section
The 9x22 section goes across the back, and thus the door back right opens into it. This section is iteself divided into three bits. The first, at back right, is an entry/foyer thing, using the door at back right, and can be just 9 x 5.
This foyer gives access to the main live area, as well as into the next small section, the control room which can be about 9 x 12. In the back left is the third small section, again of 9 x 5, which will be the vocal booth. This has its entry off the live area. This places the 9 x 12 control room centrally, and in the partion between it and the live room you can put a window.
Normally you would have the desk looking out into the control room, but I would place the desk and monitoring system against the control left hand wall, because having the monitoring space longer than it is wide is acoustically better. This means whoever is mixing would look to his (or her) left to see into the live room.
If you have a concrete floor I wouldn't worry about a drum riser. The riser would further compromise room flexibility.
I would also try to keep at least one of the roller doors still functional , , , very handy for getting gear in and out.
On the left hand wall of the live area you can mount a viewing screen.
The right hand wall of the live area . . . well, you might paint this green in case you eventually wnat to do video against a green screen.
What you get here is a whole series of compromises. But you might get reasonable functionality from it