It was , as everyone now knows , the first major outdoor jazz festival in the United States , and became the model for what is now a summer jazz-festival circuit around the world , including Montreal ; New Orleans ; North Sea -LRB- in The Hague -RRB- , Marciac -LRB- France -RRB- , Perugia -LRB- Italy -RRB- , Montreux -LRB- Switzerland -RRB- and on and on .