If you get a couple of years' work ex prior to entering any MBA curriculum, it is like Sone pe Suhaga.
You don't then have to imagine an office situation where you are an office bearer.
You don't have to imagine how businesses operate, and how the chain of command works.
Moreover given cases based on business decisions and involving office/corporate politics, you are not lost as to what will be the reaction of differnt persons when a particular decision is being taken. You will be able to read between the lines when you read about the activities/comments of different people involved in the case.
This being able to look at the happenings in a case situation differently from a fresher, certainly lends your thinking process a touch of practicality.
So good luck. Go ahead , gather some work ex, and then by all means join a Business School.