People tend to check in during these times:
Downtown food store is great for everything, lots of homeless citizens but not to worry they are really cool when they get to know you
The water feature where the Metro light-rail trains pass.
Admittedly, it's pretty cool to see Metro light-rail trains go through and past a water feature!
catch the train
Between the NB & SB stations of Main Street Square is a fountain that shoots water as trains approach; even better, you'll find electrical outlets you can use to charge your mobile devices.
Tap metro card first!