Well, here's something from my experience.  This band played the Kerrville Folk Festival one year I was there.  The Kerrville Folk Festival is known all over the U.S., and Canada as a must-do event.  It's 2 weeks of music and music work shops all day every day come rain or come shine.  We go, pitch tents, and stay there, rain or shine for the whole time if we can spare it.  Of course, mother nature cooperates, and it rains buckets.  At night, after the stage entertainment ends, people build campfires, pull out their instruments, and jam.  The artists who are there for the duration too come out, and join in, so it's a great opportunity to meet the people who entertained you, and trained you, and to watch them in action close up.  The artists like it best if the people around the campfires join in.

One year, this band, Queen Ida and the Bon Temps Zydeco Band were there.  Just as they took the stage the rain started.  The stage is covered, so the show goes on regardless.  Buckets, I'm telling you, on our heads, running around our feet and ankles, and nobody left.  We just danced and sang in the rain and had a wonderful time.  Queen Ida talks about the roots of Zydeco in this video.  So, give a listen....