Sounding ok was not meant to be a criticism. But there are thousands of tunes out there. When I went to tunes sessions I went to play. Playing a tune I already knew was far easier than playing a tune I didn't. Tunes sessions that I went to played tunes in sets. Often three tunes in a set and each tune would be played through two or three times. Every one got used to which tunes went together and once a tune was started, knew which tunes were coming up. It means that once you knew the session you could play all night. Heaven!

A new tune introduced could be a welcome relief, a challenge or an irritant. A good ear player might well be able to pick a new tune by the first repeat. Others might take longer. The point is that people go to tunes sessions to play, not so much to listen to others play. Too many times having to sit out and not play can be irritating. So going to a session you've not been to before and playing a tune that nobody knowsw could end up being an uncomfortable experience. On the other hand, if you were in a band and introduced a new tune, this could be very welcome.