I hope you are all keeping well,folks.
On topic,it all depends on why you do it.
If playing live is a source of income you better be playing what your customers want to hear,otherwise you won't be eating.
The folk out there who want to be entertained have no patience at all with unknown musicians who plays songs they don't know,as has been mentioned it's difficult enough for an established act to win over an audience who are there primarily to hear the hits.
If it's not a source of income,it doesn't matter,you are probably well used to playing for little or no money and the gigs can be used as a means of getting your face/music out there.
From a personal perspective,I'm like Boydie I kept the two separate. Covers for work and my own stuff recorded at home. (at least I did before I stopped doing both)
I played in one band which mixed the two and while we were busy enough and young/stupid enough not to be worried about little financial reward,you could see the punter's eyes glaze over when you offered up a self penned track. I'm completely well aware that in comparison to the hits,our songs were nowhere close to being good enough anyway,but that's another debate.
I earned good money playing in a wedding/functions band,but that's not about music,it's about being a backdrop to the occasion and providing a noise they can dance to,or ignore if they wish to. It's soul destroying for anyone who values music,but a dose of real world medicine anyway. If they have enough stimulants on board,they will dance to a car alarm. The money is king.
Again from a personal view,I don't '
know' any of my songs and would need to learn them before taking them live. I haven't written or played anything for over a year now,but when I was writing and recording,I finished a track then moved on to the next. I never ever played or listened to it again. I couldn't even tell you what key or pitch they are in,nor remember a single lyric line.
Davy.