For vocals bands might have their own mics (that way you don't get the flu from the opener slobbering all over the mic) but both the 930 and Black Cat (and Fletchers) have a good selection of mics for the bands to use. Usually bands might have vocal mics, kick mic, some other "fetish" mics. The big shows, yeah they have everything, and if the band is sponsored by some microphone company then they will have all their mics too. In general if you are an opener then you don't usually have mics, if you headline you might have some or all, but still it is not shocking for them to carry none. They just put in the rider what they need (and that is usually wrong too).