When barbershop quartet crooner “Colin” (Harry Melling) ends up paying for some crisps in the pub for a biker he doesn’t even know, he immediately becomes smitten. This is despite the fact that the white-leather clad “Ray” (Alexander Skarsgård) barely gave him a second glance, though he did give him a Christmas card with a phone number. “Colin” can hardly contain himself and agrees to “take the dover mais...