Conversation so far:
Who formed the band Nitty Gritty Dirt Band?
The Nitty Gritty Dirt Band was founded around 1966 in Long Beach, California, United States, by singer-guitarist Jeff Hanna and singer-songwriter guitarist Bruce Kunkel.

Question: How did they gather the other members of the band?
Self-contained rewrite: How did Nitty Gritty Dirt Band gather the other members of the band?