No you don't have to be a resident but you could simply sign in early and take a shower because long as you're on the list before everybody else takes the time
You can go around back M T Th and F from 9-2 and sign up for a shower and laundry if needed. They want everyone out at 2 so dont show up last minute. You can also grab waters and a bag lunch, sometimes better food, use the computers or wifi and sit inside. You can call but you don't have to. They did have Wed eve hours but I don't know if that's still good or what time. Tues and Th 10-12 they put out extra pantry stuff.
I would give them a call.
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