In recent years, perhaps the best venue for chamber music I've found is the Clark Library which is and isn't part of UCLA. (Okay, it's part of the university but on an archipelago closer to USC's campus than to Westwood.) I'll probably always remember the performance by the Takacs Quartet, especially their Janacek.
The Clark itself is a long and fascinating story -- lovely old Italianate building, built by local eccentric, now known for its holdings of 17th/18th c. British materials as well as more stuff on St. Oscar (Wilde) than you can believe. It's worth strolling the grounds, checking out the architectural details, and staying after for the receptions with the musicians.
But go for the music (and the acoustics.) The release and schedule is here. (NOT easy to get into -- there's a lottery.)
I'm especially pleased to see the series commitment this year to Shostakovich, one of my favorite composers and one who could turn pain into beauty and perhaps vice versa. (The Russians have a knack for that.)
See ya there, gang.