Guests attending Michelle Obama’s 50th birthday party at the White House later this month can look forward to “a little Dougie” but definitely not dinner. Word’s out that the lucky VIPs invited to fete Mrs. Obama at a “Snacks & Sips & Dancing & Dessert” party have been advised to dust off their dancing shoes and, more strictly, “to eat before you come.” While it’s always nice to give the stiletto sporting crowd a heads-up, the East Wing’s “EBYC” directive has some folks in the party planning business scratching their heads. “I don’t think it’s rude, but I do think...