I've been writing various projects over the last year and one of the main lessons I've learnt is that I really struggle write at home.
Mostly I switch between the local cafe chains, but mainly sticking with my local Caffè Neros (they have ah-mazing air con in the summer).
Coffee shops do have drawbacks though, you have no control of your surroundings. The local library has a similar effect, but requests a level of quiet reverence. But, less coffee and snack access.
I've even looked into group office places, like NearDesk, there aren't many in Hertfordshire and I couldn't afford the services available.
Some blogs recommend bars and pubs, neither of which are really my scene... I've even tried hotel foyers before, which was a bit of a mixed bag. (Very echo-y)
No control of your surroundings (screaming babies, barking dogs, people sitting too close, loud conversations and intermittent wifi)
Not affordable for everyone (I usually budget £10-£20 per full day)
Can be a little stifling
As I try out different areas, I've found these pros and cons can vary with each excursion. My current haunt is a local coffee shop in a supermarket, as it is less busy. Also Coffee. I've even started to budget for food and drink with a day's writing.
I've even tried to write at home, but found it quite difficult to focus.