Restaurant and kitchen size -- what's yours?

I posted in another thread about kitchen layout, but I was also  wondering  if I have allocated too much or too little space for a kitchen.     I'm trying to work within existing walls to cut down on construction costs - 
 
1770 sq ft
 
    kitchen is 334 sq ft
 
    main dining room  684 sq ft
 
    private dining room  240 sq ft
 
    the remainder is for restrooms,  beverage station/glass storage, office and hallways
 
this location is larger than the one I initially wanted so I was able to set aside room for a private dining room to host  wedding/baby showers, birthday parties, business lunches, etc.
 
 
 
 
 
 
 
 

2200 sq ft building, 550 sq ft kitchen.

that's a big building ... do you have a private dining room?  with that much space I'm sure you do!  

I was estimating 20% for the kitchen area, but you've got 25% which is probably a much better choice.

when I  narrowed the hall  by removing the existing wall, I gained about  1.5 ft  and the beverage station isn't in the kitchen either and that area is 66 sq ft.