For me to ever actually come to this site specifically (and risk missing out on good info from another site), I would need a strong reason to do so. An example would be, a blog where you guys go "undercover" and review restaurants. Or where you have a funny twist of some sort, or maybe take a strong POV.
Or maybe something like: I'm a vegetarian, so maybe every reviewer enters their dietary constraints or preferences, so I can search for people "like me" and see where they are eating and what they like.
Lastly, until I read the reviews her, I wasn't even clear that this was providing searchable menus, it looks like another review site. The primary point to use Google still applies. If the restaurant has a main website, I'd rather go there. If they host their menu with you, Google should fine it.