Homless band family...

So I explored DT LA today and on the subway ride back to SO, there was a homeless family. The dad had a guitar, one of the sons had a party whistle and some symbols, and the other had drums. They were performing a very well rehearsed version of John Lennon- All you need is love. I could tell the family was drugged up on something, their eyes were all over the place. So it was sad but at the same time it was really cute, they were very talented. I really wish I could have done more then just enjoy their amazing music.. God Bless THEM!! I sent as much positive energy as I could! Is there a program I can direct them to to get them help??