You have a status you can set saying- do not disturb,you are talking chat or you are busy. I think your best bet is to see if your phone can get it, then you can keep it downstairs, no one can get your number it goes through skype.
It is really useful if you have a full band, or want to invite one. Don't know if you found out yet that everyone can invite,regardless who is hosting.
Like say you and I are rocking our dlc and we are done... go to main screen and you bring in a bass and I can invite a singer or whatever.
If you don't get skype maybe we can figure out a code system again I had to just leave it when I had to run out for a sec lol.