After 17 years on the road, hip-hop stalwarts the Roots may finally park the tour bus for good. Debuting Monday as the house band for “Late Night With Jimmy Fallon,” the Grammy winners’ new job comes with a price: They must squeeze into suits and ties while playing snippets of rock, pop, Broadway tunes and ’80s cheese music. “Thank God we’re walking Rolodexes of music,” says drummer Ahmir “Questlove” Thompson. Here’s a look at who they’re up against in the battle of the late-night bands.