Facebook keeps testing features that will motivate their users to like more pages and thus, entice business owners to use the network even more as part of their campaign.
Thus, from now on, when you like a Page, a box appears above the tabs and it suggests similar pages you might like. Don't forget, "Recommended Pages" are already on the sidebar of your newsfeed, in case you haven't noticed it yet.
It seems that the data that Facebook is collecting from us are enough to create interesting suggestions, according to our needs. It depends on our tendency to like new pages whether we are becoming fans of them or not.
How often do you like a similar page that is suggested to you and fits your interests?