As first lady, Eleanor Roosevelt must have had some pretty swanky birthday parties. But they couldn't have been much better than two going on this weekend. To celebrate Mrs. Roosevelt's centennial, the National Portrait Gallery will offer a program by Joe Pipik on the life and music of Woody Guthrie at noon Friday and 3:30 on Saturday; "Women's Work" will dramatize the lives of Depression-era women at 7:30 p.m. Friday and 1:30 on Sunday; and there will be a dramatic reading of the play "Eleanor" at 1:30 Saturday and 3:30 Sunday. The National Portrait Gallery is at Eighth and F streets NW. 357-2700; free. If you're taking Metrorail, exit from the Red or Yellow lines at the Gallery Place station.

Or, you can celebrate Eleanor's 100th this Saturday at the American History Museum. At 1 p.m., there'll be first-hand accounts from those who worked with her. Earl Robinson, who performed for the Roosevelts, will sing at 2. And at 3 there will be more first-hand accounts on E.R. Don't forget the "Eleanor Roosevelt: First Person Singular" exhibit running through January 6. The museum is at 14th and Consititution NW. If you're taking Metrorail, exit from the Blue or Orange lines at the Smithsonian station. 357-2700; free.