Still listening to indie rock? If so, time to get amped for that other cellular service provider–sponsored outdoors concert: the Rogers Picnic. This year's spread includes the usual grub—ubiquitous preps Vampire Weekend and local flavour-of-the-year Tokyo Police Club—as well as finer treats, like the lovable, esoteric Animal Collective, or Cat Power and her smuggled-whiskey voice. The egg salad sandwich, if you will—love it or loathe it—is headliner City and Colour, the Dallas Green solo......