Well, starting in July we're entering into the Obon season in Northern California. Nikkei West has published a comprehensive calendar: http://www.nikkeiwest.com/index.php/component/content/article/38-obon-and-bazaar/109-obonbazaar-updates
If anyone is interested in forming a group to join in one of the many Bon Odori dances in the area, please contact the JETAANC Executive Committee at info@jetaanc.org; we can help!