It isn't that clean cut of an option. Think of it more like a hostel, except you can't get a spot for a certain amount of time, you just need to show up on time

It isn't that clean cut of an option. Think of it more like a hostel, except you can't get a spot for a certain amount of time, you just need to show up on time and hope each night. Oh, and in addition to being dry, you have to worry about violence and theft. Put another way, I don't think you would choose to stay in a shelter if you thought you'd be safe sleeping out doors instead.