Today is Mr. Orson Welles’ hundredth birthday, and you really ought to celebrate by watching Citizen Kane, or by hiding in the basement from Martian invaders—whichever is more appealing to you. If you are in Pittsburgh, you might head for the Hollywood Theater in Dormont, where you can celebrate by hearing retired Post-Gazette critic Bob Hoover, eating birthday cake, and then watching Citizen Kane on the big screen in one of the few undivided neighborhood movie palaces left in North America.