You’ve got it backwards. If the piano player added a fifth beat, then the audience would end up shifting without actually changing their clapping pattern. Like this:
1 (clap)23 (clap)41 (clap)23 (clap)45 (clap)12 (clap)34 (clap)12 (clap)34 (clap)etc...
So it’s the piano player adapting to the audience, not the other way around.
You’ve got it backwards. If the piano player added a fifth beat, then the audience would end up shifting without actually changing their clapping pattern. Like this:
1 (clap)
2
3 (clap)
4
1 (clap)
2
3 (clap)
4
5 (clap)
1
2 (clap)
3
4 (clap)
1
2 (clap)
3
4 (clap)
etc...
So it’s the piano player adapting to the audience, not the other way around.