Hi, I’m nowhere near as experienced or busy as you folks. I’m older and when I retired I decided to make money at something I was doing now and then for free on a mish mash of equipment. I do small parties, 50-100 folks in the 50 and above age range and do Dance and Karaoke BUT what you all described has happened to me and my mentor taught me well about being prepared. I have backup PA system and speakers, backup laptop, full redundant copy of my external hard drive where my music is stored, extra cables of all kinds, extra corded mics and my old trusty Ipod loaded with all my music ( yes, I’m older and still have the wonderful Ipod classic..lol) . I even have a fine Boom Box with an Ipod dock just in case the mixer goes dead. The Ipod saved my butt at a nice pool party recently where my cable from Laptop to the mixer died and hence, no sound… I just plugged in the Ipod into the boom box and there was decent music while I set up my spare….folks barely noticed. The key is, as has been mentioned, don’t panic….. that makes your brain freeze up!!! Breathe and problem solve…sounds easy and when you are “new”… it’s really hard to stay calm but do it anyway…. it’s not heart surgery, it’s dancing…folks will not die if you have a mishap. Thanks for the really great insights too…. DJ Arleen