If you thought you could get invited to the White House, say, for a state dinner, would you give it a try? After all, you’re paying your share for the spreads they put on there, so you’ve got a right to be halfway curious about what they’re like. And in case you’ve got a friend who keeps lording it over you that the mayor shook his hand at the last Lion’s Club picnic, a White House invitation might prove a handy equalizer. The fact is that White House invitations, as impressive as they may be to most people, are not all that impossible to come by. Every year, the White House hosts scores of dinners honoring foreign dignitaries on state visits.