http://stlouiswings.com/
best wings in the city imo, they have pint and a pound for $9.99 on sundays at most locations. Good service too.
The pint and a pound deal varies from location to location though.
some say duff's wings are really good but havnt tried em.
if your into something slightly healthier Wingmachine.com delivers late into the night and they bake their wings. They also weigh your wings POST cooking so if you order 1lb you actually get 1 lb.