What to wear for a volunteering interview?

Question

I have an interview tomorrow for volunteering at my local hospital. I am not sure if wearing a polo jeans is okay or to bust out the suit, or in between?

Answer 1

I wore a suit when I went for my hospital voulenteering interview, as well as my medical internship (but that's different). Both went well however.  

Answer 2

I think a suit would be overdoing it. You should be fine in a polo & jeans.