Bars/ Terraces with wireless access? (Rome)

Hello,

Now that it's warm outside, it still is pretty cold inside, and I have to work long hours on my laptop, and I "freeze". Anybody can recommend bars with terrace or half open that would have wireless access and are agreable (not too open to avoid wind!), where I could go to work and enjoy the summer temperatures as well, whilst working? Preferably around San Giovanni. Thank you :-)