By the way, one should perhaps mention that not all public radio stations are National Public Radio. KING-FM here in Seattle plays all classical music, including such things as the live Metropolitan Opera broadcasts on Saturday afternoons, concerts by the Seattle Symphony, Seattle Opera, the Early Music Guild, and other groups, plus selections from their vast record library.
From the beginning, they operated as a regular commercial radio station, supporting themselves as usual by airing commercials between musical selections. But sometimes this was a really bad mix. You're all mellow after listening to a nice Mozart Symphony, and are then jarred by some bull-horn voice huckster trying to sell you a used car. Or aluminum siding complete with non-clog eave gutters. You get the picture.
After years of listener complaints, KING-FM has become a public radio station. No more commercials. The station is now supported by the listeners (periodic contributions, sort of like voluntary subscriptions) along with institutional support (occasional announcements such as "The past hour of music has been brought to you by the support of Nordstrom's Department Store." (End of announcement—polite, non-jarring).
The late afternoon to evening announcer, Sean MacLean, is a classic guitarist himself, so he tends to play a fair amount of classic guitar. Thanks, Sean.