Conversation so far:
What happened in 1965 to Billy Joel?
Billy Joel joined the Echoes, a group that specialized in British Invasion covers. The Echoes began recording in 1965.
Was the Echoes successful?
In late 1965, the Echoes changed their name to the Emeralds, and then to the Lost Souls.
Did the the Echoes release any albums?

Question: What else did he do in his early career?
Self-contained rewrite: What else did Billy Joel do in his early career?