Topics for next class
Student questions often go unanswered during a class discussion. Collect them before they slip way so you can discuss them during the next class.
More types of activities
Team goal visualization
Ask your team to specify where focus is needed, so they'll be more likely to direct future actions toward that focus.
Sales pitch showdown
Hold a sales competition, then ask the audience to choose the team that gave the best sales pitch.
Audience demographics
Put subsequent question responses in context by gathering some quick demographic data from the audience.