There are many reasons why pubs fail. It's a very complex issue - it's not just down to the "credit crunch", or cheap supermarket boose, or poor management or even the greed of the big brewers.
One of the main factors in pub viability is (as quoted in the housing market) "location, location, location".
Since Asda moved it's supermarket across to another quarter of our town (South Shields) there has been a noticeable fall-off in custom at The Wouldhave, which for years has enjoyed a site adjacent to the old Asda store, which is now closed and deserted. The whole axis of the town has changed and shoppers no longer pass the pub on their way to the supermarket.
Yesterday, I was in The Wouldhave at lunch time and I counted only fourteen customers besides myself and my wife. There used to be many more than twice that number.
Asda can hardly be blamed, but it's a disaster for the pub.