http://www.washingtonpost.com/local/dc-politics/fairfax-county-cracks-down-on-some-restaurants-that-serve-up-dancing/2011/11/22/gIQAPRIT5N_story.html
Ahhh...
This month, Eileen M. McLane, the county’s zoning administrator, told the Board of Zoning Appeals that her agency has been reining in huge establishments that pass themselves off as restaurants with incidental dancing but operate as virtual nightclubs and disturb residential neighborhoods.
Although the current zoning ordinance says a restaurant’s dance floor may use one-eighth of the dining area, McLane said zoning administrators have been analyzing the overall design and purpose of establishments that morph into nightclubs.
McLane said the ordinance on restaurant dance floors was written in 1975, when most restaurants were small. In recent years, some establishments that call themselves restaurants have become huge, opening the door to much bigger dance floors.