La Fee Verte is a cafe-style French Quarter restaurant (620 Conti St. 504-566-7445) with open doors that face the street, as well as an open Wi-Fi hotspot. Here is a link to a web-page that endorses the restaurant’s cuisine. I haven’t tried either the cuisine or the Wi-Fi connection, but the happy couple that I saw hunched over an Apple laptop appeared to be enjoying both.
P.S. If you want a better practice, check out this Ultimate Guide.