I have read a lot of stuff on this. Still i am not able to say one thing that "Is is possible to have a MU site without creation of extra tables?"
My concern is to use a single database that can hold all users data. I am currently looking at WordPress Multisite as newbie and learning how to set it up as it looks similar to what i am looking.
But please suggest on how this issue can be settled down in order to decide my choice of CMS.