My husband and I want to eat at 21 for lunch during our trip to NYC but he isn't really keen on packing a jacket and tie just for this and I heard he might need one. Is this true? What about just shirt and tie, dockers, etc. Are there casual areas, times of the day/week at 21? If we decide to skip, are there other good lunch places that offer the 20-30 prix fixe where casual dress is ok? I think we will be there during rest. week in early July. Thanks for any advice.