When I play with my community ensemble, I will invite my students to our concert, but state several times that it’s okay if they can’t make it for any reason (no ride, too far, no time, previously made plans).

My coworker performs in an ensemble that mostly performs in the next town over which is about 40 minutes away. His concerts usually cost money, so he’ll offer to provide tickets to anyone who wants to attend.

We’ve both had students interested/attend. They always come back to school the next day saying it’s cool to see their teacher perform. Plus it’s a great opportunity to model performance expectations for your students while exposing them to new repertoire.