This spring and summer of 2022, from Memorial weekend to Labor Day...Lake Arrowhead is again having its concert series most weekends with some pretty decent bands that imitate famous groups like Led Zeppelin, Van Halen, The Doors, Pink Floyd, Chili Peppers...over 30 bands through the season.
https://www.lakearrowheadsummerconcerts.com/
The Arrowhead village is only 25 minutes' drive from the Bradford Ridge trailhead, so it's the same neighborhood, and makes a great combination; hot springs and free concert in the same day. The music carries all through the outdoor venue, so only the seats close to the stage cost $$. It's free for anyone else.