Castro Valley Chamber’s June Mixer. Thursday, June 23 from 5:30 pm to 7:30 pm at JP’s Family Restaurant & Sports Lounge located at 3600 Castro Valley Blvd, Castro Valley. Networking Mixers are a benefit of being a Chamber member. These events allow you to network and grow your business and are free for members to attend. Pre-register for this event to be entered into a special drawing the night of this event. Non-members pay $10.00 to attend mixers.  Pre-register in advance to enter a special drawing this night.  If you would like to join the Chamber, email in advance at: info@castrovalleychamber.com so they can make a special announcement and introduce you to their Board and Community.