Petanque is also known as Boules and is played outdoors on any reasonably firm surface: your yard, the park, a field, a gravel parking lot, cinder running track, etc. Hard surfaces like concrete or asphalt or very soft like a fine sand beach or long grass are not recommended. The ideal surface is hard packed earth with course sand or pea gravel approximately 1/8" - ¼" deep covering the surface. Find a place that is open and fairly flat. If there are a few bumps and hollows that's fine and can even add more challenge to the game.