Is there through traffic? Coffee is always good, huge profit margin, if its a good brand, that could set you apart from the local cafe perhaps? Make it a multi purpose space. Stock quirky but inexpensive homewares, decorations, etc. Point of difference is the key. Also, depending on liquor licence, you could try a byo for weekend lunches or themed food plates and invite a local musician who can use that chance to sell cd's. Support local artists with opening the shop space for exhibitions. Become a local hub!