A "quick and dirty" evaluation activity.
In groups of three, people prepare a short (2 minute) role play based on this scenario:
It's the day after class. One person meets his/her two friends who attended class. S/he asks them, "How was class last night?", pressing them for details. The role play ends when the friend asks, "will you go to the class next week?" and the person replies.
Like in any role play, it helps to choose a specific place and time of day, so people can imagine a context for their meeting.
Someone should take careful notes during this activity -- interesting points can come up in the heat of the moment.