ISAIAH KEEPS HIS COOL

Just before entering anger-management rehab after "homophobe" hoopla nearly got him fired, ISAIAH WASHINGTON was filling up at a gas station in the West Hollywood section known as "Boys Town" when a street hustler recognized him and yelled from the sidewalk: "Come over here and I'll show you how a gay man can kick ass!" When the guy continued berating him for calling co-star T.R. KNIGHT the "f "-word, Washington got visibly McAngry - but was held back by a male companion, who kept warning him not to make his troubles worse. "Come on...I don't care if you do beat me up," screamed the streetwalker. "You're a punk - with a huge problem!" Isaiah, glaring daggers, finally drove off.