What is the fine-grained topic of the following text: Since my wife, Susan, is the manager in charge of the online services of the Alameda County Library System (California) and I love organizing chess events, I suggested she pass information on to the library powers informing them that I would be happy to volunteer my services to provide chess game activities at the Fremont Main Branch of their library system on November 16. Only return the topic.
Volunteering to organize chess events at the Alameda County Library System