DO: Take Judge up on his generous offer!
Are you guys going to be staying in the San Jose area? Please advise of specific interests, and I will give you a few recommendations.
Downtown San Jose... There are some nice museums to visit downtown, but I would recommend you only visit downtown if accompanied by a local. It may not be "that bad" in terms of security, but I would recommend you not go there if not accompanied by a local just to be safe.
PM me, and I will provide you with my local phone number so we can communicate once you're here and I will help steer you guys in a safe direction, or help answer any questions you guys may have.
I hope you guys have a great time while visiting!
Tico