Ya - I tried that 'shared' nap room right in my playroom when I first opened cause that was what we had in centre care - however it did not work for me

As I got full the mixed age grouping and having older ones who napped a very short time and youngers who needed 3 hours of nap time in the same room...even when they attempted to be 'quiet' they still flipped and flopped around or whispered to themselves to entrain themselves and would 'wake up' the younger ones - and well I valued my quiet time more than not having kids sleeping in my upper levels so rearranged the sleep routine to make it work easier for me.

I have my 2 under two up in playpens in our bedrooms and the 3 kids over two are now spread about my upper levels on their cots so not 'directly' in view of each other and some buffer from the noise they make - I can than rearrange their cot position based on sleeping patterns with 'long sleepers' away from non or short sleepers and with the one who does not 'nap' but rests is on the main floor landing a floor away from them all so her resting noise is not an issue ... as they wake they are invited down to the main floor for 'quiet' time activities or if they do not sleep they rest for an hour quietly and than can get up for quiet time off their cot - if they are not 'quiet' than they go back to their cot to try again. Working much better for me cause the 'short nappers' now sleep much longer because they do not wake up mid sleep cycle and SEE that non napper is awake and think 'wake up time' now they roll over open eyes and see no one and hear no one and go back to sleep for another hour!

The shared sleep room is doable if it is the only option available but as others mentioned you will spend more time 'soothing and training' them to be really quiet and well even than your quiet time might be shorter than it would be if you had the separate option ... one of the things we did in centre care was arrange cots so that the non or short sleepers were behind a 'barrier' like a bookshelf or something so they could not be seen by those trying to go or stay asleep.