I am glad that you all feel that way! But apparently there are quite a few people who don't.
About 8 years ago we threw a 50th Anniversary party for the in-laws. They LOVE to go dancing, so we hired their favorite band and had them pick their favorite restaurant to handle the catering at the Elk's Club for the dance. We're talking
small town Colorado (pop. 700) and it was held at the Elk's Club, not too much to choose from, but we live 6 hrs away, they had to help with the choices.
Since Im the wife of their eldest son (no daughters) - and were the only ones to live in state, the party planning fell on me (DH was a great help though).
First of all, I had to fight with FIL (he's more the party person of the two) to send out invitations. HELLO - how was I to tell the caterers how much food to have on hand. I gave him several choices - they ALL included "Please let us know if you can attend - Call (the in-law's number)". I didn't even use RSVP as it is a
small town. FIL changed it to RSVP (he's a retired Army officer). I let it go - it was his party.
We had a 108 reply they would be attending. We told the caterer 150, he said they could handle 175.
TWO HUNDRED AND THIRTY EIGHT signed the guest book. Since there were 2 entrances, I'm sure we didn't get everyone counted. It was body to body.
Yep, we ran out of food. None of the family ate - DH's parents did get some of the cake, but the rest of the family didn't.
The next day FIL told us that, even the day before the party, people were stopping him to ask what RSVP meant. WHY didn't they CALL and ask!!!!
It did turn out to be a great party. FIL had such a wonderful time, that he threw another party for their 55th - BUT he limited the number he invited and he kept track of who hadn't responded. The entire town was invited the first time (and some from neighboring towns).
After living through all this, I told DH that I was
really glad my parents are divorced - we weren't going through that again.
You can bet we RSVP.