Of course you would be free to leave the venue ! lol You are making an assumption that everyone plays in a venue where all attendees are sitting or standing, with 100% focus on watching the band ! I got some bad news for you, that's not a typical gig for working players, be it a Bar, Festival, Dance , Wine room etc... Why is it we think they keep yelling at us to "Turn it Down " ? Because we are interfering with whatever else they may be doing, like talking to each other or trying to pick up a gal or guy etc...! Most bands and performers are part of the "environment". THATS A GOOD THING. People may sing along to a song they know, or maybe not. They may pay attention, they may not. The live music is an added plus to the social environment , or in the case of a DANCE, to provide the music to DANCE to! Good bands play music people can dance to. Not all bands play music people can dance to, even though they think they can. Working bands are not responsible to give a visually pleasing presence to people who may be watching. They are responsible to play good songs and play them well. Songs people can relate to. We've never lost a gig because we were not looking energetic on stage, but we have lost gigs because we didn't play material that the "attendees" could connect with or in some cases, could not dance to. IF all we ( you) do is attend shows where its all about the band on stage, (maybe originals) then sure. But I seriously doubt that a band playing a SHOW/CONCERT are playing any material that they are not trying to present with maximum energy.