hmm.. there's main place, with parking lots/parking structures. or south coast plaza.. the block has parking lots. there's a park, Garden Grove Park, right next to my high school, bolsa grande with a parking lot but the road is preettty bumpy. idk about the lighting at night though.
my gf's uncle just told me, "behind pavilions, on chapman and brookhurts, across from regals theaters. quiet there, just don't be too rowdy and you'll be okay" lol those are my sugguestions [: