The Lively Arts program brings artists from around the world to play gigs at Stanford. On a given weekend, you might see anything from the Merce Cunningham Dance Company to an acapella women's chorus from the Third World. In general, the fare is respectable -- there is nothing here you can't take your quiet children or curious grandparents to. Ticket prices are fairly reasonable, often starting at around $15 for the back of the balcony. If you are a student, you can get a half-price discount, so go ahead and seize the culture!
The variety of artists is great, but it can also be a bit hit-or-miss, so choose your shows wisely. Check the website, livelyarts.stanford.edu, for current listings, but be forewarned that shows often sell out far in advance, so plan ahead if you can.