Matchbox at 713 H St NW
Nando's Peri-Peri at 819 7th St NW
Luke's Lobster at 624 E Street NW (it is a very small space with a very limited menu)
Zaytina at 701 9th St NW (bringing kids there may be OK, depends on kids' personalities, time of day, ...)
Ceiba at 701 14th St NW
Central Michel Richard 1001 Pennsylvania Ave NW (I didn't love it but many people do and based on my experience I would be willing to give it another try)
Acadiana at 901 New York Ave NW (can also be OK for kids, they actually have a good kids menu, but also nice enough for night out without kids)
This is nowhere near a complete list (especially for the upscale list) but I only like to recommend places I have been to. There are several restaurants on my "yet to go to" list in that area.