[Avodah] Extending restrictions of 9 days

[Ben Waxman]

Is there any concept of extending the basic minhagim restrictions of the 
nine days like no meat or no wine to other "fancy" type foods? A great 
salmon steak is just as good or even better than many types of meat, 
certainly it is more expensive and can be seen as a delicacy. Similarly 
good beer or whiskey is certainly just as "sameach" as wine. Or do we 
say "the minhag is the minhag and don't go adding even more items to the 
list". IOW it is entirely possible to fulfill the letter of the minhag 
and yet not feel the nine days  at all.

Has this been discussed here?

Ben