None Tony...This is just an OPEN Jam at a Old Grange Building We rent Free to Public. (A lot of Seniors like Me I'm 70) Nothing Pro about it, Just a lot of fun for everyone. Free Coffee Finger Food etc...We Average Maybe 8-10 Musicians some Vocalist up front in a Half Musicians Circle. The remainder of Vocalist come up front 2 songs per Set to Sing averaging 15-20 people total on the sign up sheet...Some has been in Bands, etc over the Years. The reason for 6 Vocal Mics is some do 4-5 part Vocal Harmony...We average 50-75 People last Year. We Go through the list about 1-1/2 times on average...People donate well. 6-10 Homemade Pies is donated each event By My Partners Wife they are raffed at the end of the evening...We also Give a $50.00 Cash to a name picked from a attendance signup list...It's just not local, some attendees and performers travel 5-20 miles!...I'm less than 3 miles. I've made a lot of Friends....I hope this helps You understand somewhat. I Also attend 3 other Jams on Friday or Sat Nights per Month...I enjoy it a lot...Got to Have Fun in Life......Thanks Harold {PS Maybe I can get a Photo at some point if I can figure out how to put it on the forum}