M's entrance was situated up on the balcony to the left of where you see the stage in the main room - the room actually would have run above and behind the stage area in the Main Room.
Walk up the (gents bog) staircase and turn back on yourself the double doors into M's 'foyer', a carpetted area about 30 foot by 15 (which would have been above the Gents bog) were on the left.
The foyer walls were covered in faux wood veneer panels - big one, small one, medium one kinda thing - people usually sat about on the floor chatting.
On the right hand foyer wall were two sets of doors (one either side of the small stage that housed the dj area on the othe side of the wall) that led to M's dancefloor - and facing you on the back wall to the left was the small staircase to the balcony that ran up and right.
On M's ground/dancefloor we used to try and get one of the booths through the left hand door (dj's to your right) and generally facing where Wayne Hackett from Leigh would dance - you could get about four or five in a booth seat.
If you managed to get through the generally locked doors at the back of M's it brought you out at ground level, which was a bit of a headf*ck - we nicked in that way on occassion and hid in the bogs til we heard the music come on.
The balcony was quite a tight area at the sides (people would crash there making it more difficult to get by), prob five foot from balcony to the wall but there was a fairly decent spacious area at the back which would house carpet dancers.
It was a real sweat-box when at it's height.