Boards
Why is it generally considered to be quite alright for a man to go into a bar alone, but not a woman?
Something of a generalisation, admittedly. But, it seems that whilst many man are happy to go into a pub for a pint or a meal on their own whether whilst they're killing time before a train/date/gig/whatever women are somewhat more hesitant to do the same.
I asked my mum this question a couple of years ago and she told me that the only women who drink alone in bars are prostitutes, but from a statistical standpoint this seems improbable.