I'm technical a CLUG member, but not very active - too busy running my business(es) and raising a family.
Ubuntu has come a long way and would certainly be an option provided that the machines are offered /with/ support and training. Do not expect Windows users to jump at Ubuntu without a bit of help.
In my experience, that's where Linux goes wrong - the learning curve doesn't seem very steep to people whom use it daily, but for those whom have only used Windows, and maybe Apple, the curve looks incredibly daunting. I mean geez guys - all the buttons are in the wrong places, the pictures aren't right, and the colours aren't the same as Windows..! Tongue in cheek of course...
I've found all that's required for an average user to accept Ubuntu is a warm friendly tone, reassurance that they can do everything they want even though they have been incorrectly informed that they need "Microsoft this" or "Windows that", and to build the understanding that if you have questions, ask them: solutions are available, and you will receive help.
And that's my 2¢ for what it's worth.