Thus far we know:
Lacey and Danny were together that night at his house, but Lacey can't account for where Danny might have been because she was sleeping
Scott was with Gina for most of the night so he is safe.
We don't know where Sarita was.
Archie borrowed Scott's car, so we aren't sure where he might have been
Phoebe we also don't know anything about in terms of the night in question, but considering her and Regina weren't talking at the time, she likely was at home.