Some people will gather and grieve and talk about it, some won't.
Yes, but where and when? When my mother died, there were so many people who wanted to grieve and talk about it, her nearly 100 year old sister-in-law, her 97 year old sister (who live about 400km apart), a few old school friends, university friends, her work colleagues, my and my brothers' friends who had spent a lot of time at our place growing up, people who had never met her but wanted to be there for me. Where should they meet to grieve? It would make most sense to do that. Hire a caterer, and have them come to the house. And many of them are Catholic, and they would like to pray together for mum? Why not do that at the parish church on the same day as the party? And as there will be quite a few people gathered in the Church, why not ask the priest if he can say a mass in my mother's name at the same time, something she would have appreciated? And we have to dispose of her body respectfully, a part of humanity so fundamental that neanderthals did it too, so it probably dates back to an ancestor of both homosapiens and neanderthals. And do that on the same day as the party, so those who have travelled to join us that day can show their respect in that manner, if they want to.
So that's what we did.
And it's not about closure, it's a chance to mourn and share your memories with others that loved the same person. I cherish the moment at a good wake where you laugh heartily and say "Dad/Mum would have loved this party"
I think the actual internment is not everyone just those closest, so while we made people welcome, we suggested they should go back to the house for food and drink. It was lovely to come back to a party in full swing.