During his heyday as a teen idol, Scott Baio received 5,000 letters per week from adoring fans. Just as the urban edge had worked for a number of rising screen stars in the 1970s (i.e., John Travolta), Baio adopted a similar stance. His thick Brooklyn accent, disco mop of hair, bronze color and tight jeans were turn-ons for young teens who tuned into "Happy Days" (ABC-CBS, 1969-1984) to watch him as Chachi Arcola. Baio gave them not just sitcom froth, though, but also a host of dramatic performances of teens in trouble. When the teen idol days petered out and the offers for feature films and