Agreed, i dont do 1:1's with my team a) i have about 90 folks to deal with, so it would be near to impossible. b) all my folks know (and do) that they can grab 30 mins at any time with me if they have something on thier mind. I kinda keep track of who is not talking to me, and hit them up with a chat now and then.
I also do something I call "walking the floor", where every few hours i get around everybody and just say hi and ask how everybody is doing, and what they are up to, ask if they have any problems. Show interest in what they are doing. I usualy time it when i know folks are takimg natural breaks etc so i know im not distracting them.
It seems like too much to have one person managing all 90ds. I guess this is where people either agree or disagree about the layers of middle management...for example have local leads reports to local manager, and local manager reports back to director/VP/SVP or whatever if you have people concentrated in various location.