Rochambeau is a big, brassy French restaurant on Boylston Street in the Back Bay, which is exactly where you want your big, brassy French restaurants. There’s a bar downstairs where you’ll find some great cocktails, and a dining room upstairs filled with giant leather booths that are perfect for all the people expensing meals while in town for a conference at the Hynes Convention Center. The menu is full of rich food and a lot of lobster, and while it’s not particularly outstanding and isn’t quite worth it if you’re paying on your own (most entrees are between $25 and $30).