title: How to use categoryId in Foursquare Venues search API
body: <p>I am getting unexpected results from API queries when including a categoryId parameter. </p>
  
  <p>For instance, when using the following parameters to search for 'The Citizen Public House' in Boston, MA </p>
  
  <pre><code>ll: 42.3489027315987, -71.096134185791
  query: citizen 
  categoryId: 4bf58dd8d48988d116941735    &lt;== 'bars' 
  </code></pre>
  
  <p>The results wind up including venues from other categories, like 'banks'. Is there something wrong with the categoryId parameter? In the API documentation it is labeled 'experimental.' Am I using it improperly?</p>
  
  <p>FYI: I am using the quimby gem to interface with the foursquare API via a rails app.</p>
  
  <p>Thanks!!  </p>