I'm trying to find a good place in Harvard Square to have a quick 21st birthday dinner (about 8 people). We're on a college budget, but I still want it to be somewhat nice - think relatively inexpensive yet classy. The options I've come up with are Cambridge 1, OM, and Small Plates. I'm leaning towards Cambridge 1, although the downside is that it doesn't take reservations. Does anyone have any other suggestions or thoughts? Thanks!