The Port Workspaces operates coworking and meeting spaces in Jack London Square and Uptown Oakland's Kaiser Center. They offer flexible coworking plans that include private offices, dedicated desks, meeting rooms, rooftop gardens, WiFi, Printing and Member Networking Events.
344 20th Street
There are two locations and a wide range of membership options. Photos below are from the Kaiser Center location, and are CC-SA-BY Our Oakland.