1. Go to Analysis > Information Library.  Click Add an ad-hoc query
  2. Select the source view of Program and click OK
  3. On the left, click on Locations
  4. In the middle, click on Name and move this to Include Records Where. Set the criteria equal to Not Blank
  5. In the middle, click on Name and move this to Results fields to display
  6. On the left, click on Program Events
  7. In the middle, click on Start date and move this to Include Records Where. Set the criteria equal to Today
  8. In the middle, click on Start date and move this to Results fields to display
  9. In the middle, click on Start time and move this to Results fields to display
  10. In Set Save Options, ensure to create a Dynamic Selection so it automatically updates for you
  11. Save and close

Your final Query should look similar to below:
Locations Booked Query Screen Shot