It was a highly excitable crowd at Spago in Los Angeles the other day. Comic Kathy Griffin threw herself on Blair Underwood in front of his wife, Desiree, at NBC’s pre-Emmy party, and blurted, “Blair! I’m ready for our wedding!” Underwood blushed. Then, “Community” actor Yvette Nicole Brown was overcome with emotion after running into TV doctor Hugh Laurie, exclaiming, “Being on ‘House’ kick-started my career . . . I owe you everything!”