These two paired bits add little to Patrick’s character beyond 1) reminding us he is just a teenager and 2) showing us one of the things that binds him to his titular town. The latter is important because his uncle Lee may move him out of it.
Unfortunately, the terribleness of the band makes Patrick less interesting, not more, and makes this particular bond to his hometown flimsy. I’m not asking for Jack Nicholson suddenly playing a busted piano like a virtuoso minutes after clocking out of the oil-rig in Five Easy Pieces, but some nuance or passion or depth of character would have been nice. If I am supposed to spend over two hours giving a shit about a guy, please make him interesting. Beyond the death of his father, the boy possesses little to excite our sympathies. I mean, he’s one of those dudes juggling two girlfriends once. Nuts to him.