Many organizations that sponsor string quartets and some quartets, on their own, plan a season of events and offer subscriptions which typically offer discounts for those who buy multiple tickets. Subscription opportunities are usually offered in either the late Summer for a "season" that usually begins in the Fall and run into the following Spring, or early in the new year. Subscriptions for summer festivals are usually announced in the late Spring or early Summer.
We list a number of local string quartets under Local Quartets and we list organizations that present music programs under Impresarios. In all cases, if we know that the local quartet or the Impresario offers a season subscription we will mention it.