Wedding: 100 guests seated luncheon in DC

I realize that there are many threads already about having a wedding reception in DC, but I wanted to start a new one because I haven't found exactly what I'm looking for just yet.

I'm getting married this October and my fiance and I would like to have 100 guests for a seated luncheon. I've been looking mostly at restaurants because the value seems to be a bit higher given that it isn't necessary to pay a site fee. I'm thinking that we can spend about $7,000 (not including alcohol, but including tax, tip, fees, etc). My fiance is european and about 30 of his friends and family are making the trip, so I want to have an intimate event if possible.

I'd also love something historic since so many guests will be from a foreign country.

Any ideas? I'd be so grateful!

Thanks.

aswed09 in Washington DC & Baltimore Area