The answer has always been yes, as long as you do not have employees from your company using those computers.

I am laughing here because I tried to install my copy of W7 on my wife's computer, thinking 64 bit for me, and 32 bit for her.
That lasted about three weeks until I got a message..... "Buy a number for her computer or it will be windowless in a week" Something along those lines.
So I bought the number.

Best,
Fred