How about this?
Charles "Charlie" LN ,57, of WH and formerly of TR, died suddenly late Wednesday night. He was born in MC on January 28, 1951 and was the son of the late Charles and Helen (maiden) Last Name. He was also predeceased by his wife of 27 years, Christine (maiden) Last name.
He was employed at IRM. He was of the Catholic faith.
Survivors include a daughter Helene LN of town, a son Robert LN of town, a sister DH of town, a brother RP of town, and a sister LD of Orgiwigsburg. He is also survived by 3 grandchildren Abby LN, Allison LN, Aidan Last Name, his cherished companion DC, and numerous aunts, uncles, nieces and nephews.
A memorial dinner party will be held in his honor June 21at 2pm at the TR Firehouse...
You don't need to put he was predeceased in death by his wife...predeceased is enough of an explanation. The "in death" part sounds sort of redundant.
For the memorial...do you want to say it's a dinner party or do you just want to say it's a memorial service or maybe a memorial gathering??? What if you decide not have it be a dinner?? If it's really just going to be a group of people getting together to remember him with no formal service, then I think I'd probably call it a memorial gathering. Let people be happily surprised when they get there and you are serving food.