University Avenue in Palo Alto is fabulous fun.
There is the Stanford Theater (which is a revial house run by the fabulously wealthy David Packard) The
current schedule. Loads of fun restaurants and some good used book/record/cd stores. A great street for walking.
In SF, keep in mind a Cable Car ride will set you back $5 a pop these days! Buy a day pass if you can and if you're roaming the city via public transport.
Too many restaurants to list (but if you want some ideas, PM me)
The De Young Museum has recently re-opened (I've not been yet) and there is the SF MOMA too!
Most importantly, HAVE FUN!
Donna