"We're at the Intercon, how about yours?" I said.
It's a funny thing here (in Abu Dhabi), but all the high school graduations I know of took place in a swanky hotel. At home in the US, they are almost always held on the school grounds, either in the gymnasium or under a large tent erected for the day. After the ceremony, families go either home or to a restaurant. They have a large, "open house" family party for the new graduate. Even posh boarding schools follow this practice.
Our son's graduation ceremony was followed by a dinner dance at the same hotel. This was lovely, too, but had the feel of a wedding (an American wedding). It was also quite expensive and our younger children were not allowed to attend. (There was an age cut-off.) It was a nice evening, but I still vote for the American-style graduation.*Our children attended an international school in Abu Dhabi. This post does not reflect local graduation customs.