Times have certainly changed for the Goo Goo Dolls’ frontman John Rzeznik — but he wouldn’t have it any other way.The singer is currently gearing up to head out with bandmate Robby Takac and Train on a co-headlining tour kicking off on June 7, and he tells PEOPLE that the band’s days on the road now look a lot different than the shenanigans they’d get into on tour in the late ’90s and early 2000s.“There’s no booze, no drugs, no girls,” Rzeznik says with a laugh. “There’s children and babies and dogs and cousins and uncles and aunts. And I love it, I’m having so much [more] fun this way than th