The blood alcohol limit is 50mg per 100 ml of blood. If you're caught above this limit you'll be fined up to €1,250 and have your licence suspended for 1-12 months.
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Most people will have a BAC of 20 to 50mg after 1 standard drink.
What is the 6 drink rule in Portugal? These rules mean, if you stay at an all inclusive hotel in one of these resorts, you can have a maximum of 6 alcoholic drinks a day as part of your all inclusive package – 3 at lunch and 3 with evening meals.
While there's no obligation to tip in Portugal, it's also important to remember that when you do leave a tip, it's essential to use cash euros (the European currency), so the recipient of your tip can easily use the money without having to make a special trip to a bank (and then pay a transfer fee).