I talked to my g/f again and got some more details. It sounds as if she's thinking there will be more "calendar" events than website links that will show up on this that she would want.
The people posting will probably not be known to us before they post, so setting them up in a forum probably wouldn't work.... We're hoping to publicize the site as a place for people to make their events known to other people, so we'll get a lot of "strangers" wandering in to post their stuff. We just want to have nothing show up on the site until it's approved by one of our people.
Hope this additional detail helps.