Pappy,

Your best bet is to just Google & Geo Locally expand on some of the following keywords...

Studying the misc. Competition and business models with a little Borrowing of the best ideas along the way...

online menu,online menus,online menu maker,online menu planner,online menus nyc,online menu planning,online menu builder,online menu ordering,online menu design,online menus boston,online menus chicago etc. etc...
https://adwords.google.com/select/KeywordToolExternal
http://tools.seobook.com/keyword-tools/seobook/

Phil