rationalskepticism.org

Rather obviously, scratch cards can be picked up in a minute or two in your local supermarket while you're probably there anyway doing your shop, or at the newsagent popping in for a few bits. You can easily nip to the corner shop for a card or two. They don't require a special trip to a different place full of primarily men, with an aura of despair. This makes them accessible to most demographics, including women, who tend to the less 'grimy' suppliers of gambling. And, of course, what Thommo said.