If your friend is in a band or a comedian, and they send you an invite to something. It is always in the best interest of your friend that you do not select that you will not show show up. Really that’s quite unthoughtful and very unkind.  Who goes to a show if everyone says they aren’t going?

So for your friend’s sake select the option that says you are going, then quietly private message the person who sent you the invite and tell them you will not be able to attend. That way they do not rsvp you a seat.

Imagine missing the show that everyone is going to be at.  Now imagine missing the show that everyone says they will not attend.

As a friend always say you will be there. Even if you can’t. It will not break their heart if you explain this. It does them good when you select “attend”.