Hi Ladies!
My venue just told me as of January 1, 2014, no event venues in Riverside County are allowed to have events that go past 10pm. I had to move my whole wedding and ceremony up because of this, or they would have given me a full refund if I wanted to go elsewhere. I'm not sure if this includes individual cities within the county, but I am getting married in an unincorporated part of the county.
If you have already booked, your venue should have informed you already, but if you haven't booked yet, keep this in mind if you are planning on having it in Riverside!