1. The statement came in one of two impromptu news conferences.

2. The scene among the waiting adults was like an impromptu community meeting that nobody wanted to attend.

3. Customers will be able to make appointments or get impromptu answers to questions.

4. They can be impromptu or planned and are sometimes described as moving block parties.

5. Before you throw together an impromptu Twitter chat session, follow these steps below.

6. It was unclear whether an impromptu, informal call with a foreign leader would be logged and archived.

7. An impromptu branding session happened later in the evening.