by Mark TarsesTix Bay Area offers half price tickets to shows of all kinds in San Francisco and around the bay area, from big budget musicals to opera and concerts. Most tickets go on sale in the morning for that evening's performance. Some tickets must be picked up in person at the Tix Pavillion at Union Square on Powell Street between Geary and Post, but many can also be purchased on-line. Their web site Tix Bay Area will tell you what's available.