I am in the process of finalizing our guest list in order to send save the dates. Both sets of parents (we are all splitting the cost) have couples on the list who have kids that are in their mid-20's that still live at home. They are friends of our parents, not relatives. As a result, our parents are insisting that the kids receive an invite as well. These are people that my fiance and I would consider acquaintances that we were either friends with when we were very young but are not in contact now or we know them from high school but were not friends. My fiance and I have not yet met one of the people in question. With dates, it would be an additional 8 people.
I am not worried about the cost of the additional people, but I feel awkward extending an invite to people that are our age that we are not close with or do not know. I don't want to be introduced to people for the first time (except my fiance's extended family) at my wedding or have to fake happiness to see a person at my wedding that I wasn't a huge fan of in high school. I also feel that it would be boring for them come to a wedding where the only people they really know are their parents. I would not feel slighted if they had a wedding and invited my parents but not me.
So should I just suck it up and invite them and hope that they don't come? Does etiquette state that I have to? It's not a hill I am willing to die on, but I am interested to see if there are suggestions for convincing our parents that these 8 people do not have to be there. I have already mentioned to my mom that I don't want to invite them, and she thinks that we "have" to but couldn't state any reason why.