Rod Stewart's Arco Arena show on Wednesday night showed why his fans have stuck with him throughout his long career.Rod Stewart's rock 'n' roll show, playing all the hits all night long, swept into Arco Arena on Wednesday, and it soon became clear why Donna Hamaker and Melisa Askew were there. They met a few years back at one of Stewart's shows, and when Hamaker's husband gave her a 50th birthday present of a trip to Las Vegas, San Jose and Sacramento for three concerts in five days, she asked her best Rod Stewart-lovin' gal pal to come along, both traveling all the way from Alabama. "I've been a fan since 1971, for 38 years, ever since a record dropped down on the turntable and I heard, 'If I listen long enough ...,' " Hamaker said before Wednesday's show.