Can I get in on Sunday? Also what is the policy to even get in? and do they deny people? if they deny me does that mean I have to sleep outside?

Intake's are done on Mon-Fri, call for questions, if there is room, they would only turn away rarely, violent offenses, etc. There are other places with similar programs, Salvation Army, Catholic Charities, a quick phone call should answer any questions

Just go there you can get in. They are like a depot for three shelters and feed you there.