It's a meaningless term, like many hobby terms. Think of all these hobby terms  as marketing, just like Madison Ave. uses in ad copy to sell to consumers . Nothing more, nothing less.

...it means the menu is more expansive...and possibly more expensive

When I put open minded on an ad it means; I'm receptive to new things or things not specifically listed on my ad, don't be shy shoot me a message, it never hurts to ask.  

It's really that simple. =

Just a marketing word like VIP and such.