SOME things never change, do they? In 1963 jazz man Vic Sefton played Frank Sinatra numbers at the opening of a luxury hotel - the Mandarin. Three decades later, Vic - husband of celebrated mama san Pat Sefton - found himself at the opening of yet another prestigious hotel on Monday, the Ritz-Carlton. And, boy oh boy, didn't he feel deja vu setting in. According to Vic it was the same atmosphere, the same music from Ol' Blue Eyes and, would you believe it, virtually the same people! At least Vic was wearing a different suit.