You will just have to collect data from a yellowpages type website. Data of restaurants: name restaurant, email address, telephone number, address, website.
It will be just copy/past work most of the time. If a restaurant doesn't have an email address in the yellowpages, you do a quick search in google to see if you can find it on their own website. That's all really.
Provide price per 1000/5000/10000 entries please + timing.