I wish you had put a YANBU/YABU option up
*@KQuest*
IMO YABVU. I know people have differing views on situations like this, but if you are having a party/celebration for yourself or partner or child, it's SO wrong on SO many levels, to ask people to pay money towards it/pay for themselves.
Some people think it's OK, and normal in 'their' circle, but it's weird and rude in mine. (I haven't read the full thread, but i bet someone has already said 'it's a class thing.') 
Up until about a decade ago, it was unheard of to have a party or a 'do' and ask your guests to pay for themselves. In this past few years, I have heard of people asking for £40 per person for Christmas day dinner, people asking for money off potential guests towards their wedding and honeymoon, people having a party for their child and asking the parents of the children invited for money towards the invited child's meal, and people asking to pay for themselves before they can come to the party they are invited to (and there are many more examples!) LOL, what a nation of CFs.
Basically, people want these celebrations, and to look all showy and big, (on facebook and instagram and suchlike,) but want other people to fund it all for them! Really classless and vulgar.