I have offices all over. Check out
http://www.regus.com, they have many offices world wide and you can even decide if you want 5, 10 or unlimited days of access each month and different price plans. There are usually nice young girls at the recepiton desk, coffee machines and open, fresh surroundings. You can have your own private office or work in an open office landscape.
Since I'm travelling a lot, it's really nice to always have a place to call home, which is nice and clean and just works. Printing, faxing, conference possibilities and much more. And you can either have a membership on just one of their locations or the one I have where I can walk into anyone of their locations world wide.