Conversation so far:
How did Hornsby come to know the grateful dead?
CANNOTANSWER.
What happened between Hornsby and the Dead?
At some shows in 1988 and 1989, he joined the band as a special guest and played accordion or synthesizer.
Are there any other interesting aspects about this article?
Hornsby was the presenter when the Grateful Dead were inducted into the Rock and Roll Hall of Fame.
Did he play any songs with the Dead at the induction?
CANNOTANSWER.
Did people like it when he played with the grateful dead?
Since his first involvement with the Grateful Dead, Hornsby's live shows have drawn Deadheads.

Question: DId he ever play any other instruments when he played with them?
Self-contained rewrite: DId Bruce Hornsby ever play any other instruments when Hornsby played with the Grateful Dead other than the accordion?