Delhi Dhaba
Delhi Dhaba, web site, 2424 Wilson Blvd., Arlington, VA, 703-524-0008, usually open (Metro Trip Planner - opens in new window) [Washingtonian], other locations: 7236 Woodmont Avenue, Bethesda, MD, 301-718-0008 and 4455 Connecticut Avenue NW, Washington, DC, 202-537-1008 [Washingtonian | WaPo | City Paper | openlist | Yelp | Gayot]
The food simmers in front of you at the counter, and you order what you want. Weekend buffet. Very quick, very cheap, good atmosphere, good Indian videos and TV programs - this place fills a niche. Not the finest, but I like it. That said, many of the other local Indian restaurants and improving and this place isn't, so take note.