By definition, the word "청음회" means a group or meeting that/where one listens to sounds or music of a particular singer via a specific sound device. Therefore, you could say, hypothetically, that you are having "청음회" if you are listening to your friend singing. However, "청음회" is more often used to describe "pre-listening" of performance, and it isn't used often in colloquial conversation. If you say "I'm going to go for "청음회" when you are going to go to see any music performance or concert, many Koreans would be wondering what exactly you are trying to say. So, if not necessary, don't use it.
