Robby Takac, bass guitar player for the Goo Goo Dolls, said his only memory of visiting Chattanooga is playing "Chattanooga Choo Choo" on the tour bus. Perhaps this time around, he'll leave with a more indelible impression. The band plays the Coca-Cola Stage tonight at Riverbend. Formed in 1986 in Buffalo, N.Y., as an antidote to hair-band pop culture, the Goo Goo Dolls have evolved from angry young men who wanted to make some music and get a few free beers to Grammy-nominated, Billboard chart-topping superstars. "We grew up with AM radio, and when we got a little older, w