I have created a business page for my restaurant. My boss's wife has nearly 5,000 people who like her business page. Is there a way to "invite" all of the people who like her page to like my page?
There is no direct way to do so. Some other ways are:
You can ask to your boss's wife to promote your page from her page. If she can post a status to ask to all fans to like your page by giving your page link.
You can create an ad called
Custom Audience. It can be done by using email addresses, phone numbers, Facebook user IDs or app user IDs.
Custom Audience: Use email addresses, phone numbers, Facebook user IDs or app user IDs to create and save audiences you'd like to show your ads to. Learn more about Custom Audiences.
So you can use boss's wife page fan's email ids, phone numbers or Facebook user ids to target them.