One thing to note is that some countries have lower limits depending on how recent your license is and whether or not you are a professional driver or operating something besides a typical car (bus, taxi, motorbike, plane).
Drunk driving law by country - Wikipedia, the free encyclopedia
As far as comps, both Canada and Great Britain (figured you'd accept those since they speak english and are democracies) have similar punishments.
Canada - minimum for first time offense is $1,000 fine, 1-year driving prohibition 2nd or 3rd you WILL serve jail time
Great Britain - 3-6 months imprisonment, driving ban, 2,500-5,000 pound fine
Refusing the test in GB is a max of 6 months imprisonment, max 5,000 pound fine, and a 12 month driving ban
Mexico and Canada will refuse to let you into the country if you have been convicted of drunk driving within a certain number of years.
Not to mention it is very expensive to obtain a drivers license in England. So, you don't want to hinder your privilege by a poor judgment call.