Atmospheric indie rockers Grizzly Bear perform with the Los Angeles Philharmonic Orchestra tonight at the Walt Disney Concert Hall. It's an evening in two parts: first, the LA Phil play a classical program curated by the band, and then Grizzly Bear move forward with a set of their own lush, yet restrained, pop ditties. The collaboration, grandiose as it is, perfectly teases out the complexity of Grizzly Bear's subdued, breathy arrangements. The show follows on the heels of band member and LA-native Dan Rossen's performance at Disney Hall last month, as part of the Songs of the City series.