Strange Invite

You get invited to a fancy party and you are told to eat before you come to party.
Sound like a party in the 'hood or trailer home, right.
Well, you would be wrong.
It's an invite to Michelle Obama's birthday party.
From the Independent UK: If you can drag your attention away from a certain other First Lady, can I remind you it’s Michelle Obama’s 50th birthday tomorrow? She will celebrate her half-century on Saturday with a monster thrash at Oprah Winfrey’s 11-room mansion in Hawaii. Have you had your invite? Mine’s inexplicably delayed in the post but I understand that it’s caused a few ructions....
Anyway, time went by and the real, in-the-post, suitable-for-framing invitation arrived. It contained instructions. It told the guests to “wear comfortable shoes,” to “practise your dance moves” and lastly, to “Eat Before You Come.”
Whaaaat? This simply, cheery injunction has gone down like a rat sandwich with etiquette watchers in the States. They’re calling it “tacky.”  Two ladies on HuffPost Live grimly agreed: “There’s a line that’s been crossed here… into being rude.” A party expert pontificated: “When it comes to making people feel welcome, we give them great music, a well-stocked bar and excellent food — and you do it abundantly.”  http://www.independent.co.uk/voices/comment/happy-50th-michelle-obama-i-hope-your-rules-for-party-etiquette-cross-the-atlantic-soon-9062342.html
Maybe the Obama's are saving up to pay their divorce attorneys?