Kevin, the particular event I took my stuff is a no holds barred situation. My songs do not translate to solo very well so I took my "band" in on a phone. The stage at this place is big enough for MAYBE a duo, and it is billed as a songwriter showcase. You can do 3 songs in your alloted 20 minutes, and 10 people perform, so the call it "10x3" and it is quite popular. A lot of folkies and some country. Most just want to get first impression live feedback.

For me personally I have no issue with someone playing over tracks they created in a home studio.