title: Dataset size for recommendation algorithm
body: <p>I am working on creating a recommender system,using <strong>weka</strong>. What i read about dataset on internet so far is 
  It should have more data for recommendation to be good.
  I wonder what if I am trying to recommend something about which we can't have large amount of data.
  For example if want to create a <strong>Park or hospital recommender system</strong> for a particular city. It wouldn't have more than 100 entries. So is it ok to do it with <strong>small datasets</strong>?</p>