I don't dream about events, more I dream about places and then end up going there weeks/months/years later.
It's nice when I go there and I get this feeling like I've been there before.
It's pretty vague, though. A lot of the scenery around down town where I live looks similar, so it would be pretty easy to mistake a place for something I'd dreamed about.
Once I went cinemas with my friends and two of us found we didn't have enough money, so we sat around the waiting area and wandered for about two hours 'till the movie was over. I didn't mind because the area around me was very familiar and it was pretty interesting to be there.