ATMs widely available. Credit cards accepted in most hotels but not all restaurants. Non-European credit cards are sometimes rejected.
Bars Not expected.
Hotels €1 to €2 per bag for porters; not typical for cleaning staff.
Restaurants Leave 5% to 10% for a cafe snack (if your bill comes to €9.50, you might round up to €10), 10% or so for a restaurant meal.
Taxis Tip 5% to 10%, or round up to the nearest euro.