Wimbledon itself is a somewhat divided place. There's a lot of City money in Wimbledon Village. As HTC says, think Alderley Edge. And then there are some fairly poor areas in Plough Lane and its surrounds. In fact like most of London, it has pockets of poverty and pockets of ludicrous wealth.
I suspect that most of Wimbledon's supporters aren't from the posh bits (wall to wall Chelsea fans). But there will be enough of them to make a difference.