I hate that people never RSVP to birthday parties. I'm having my son's 6th birthday at Chuck e…

I hate that people never RSVP to birthday parties. I'm having my son's 6th birthday at Chuck e cheese and what I pay depends on how many kids go. But I have to tell them how many kids I'm expecting a week prior and no one will give me a definite answer! like I'm not going to be mad if they can't go but I want to know yes or no. lol. so frustrating.