Ok, so this is what I do:
Make groups of 4-5 students, select one student from each group to come to the front and sit down at a desk (backs to their groups, faced toward the projector/monitor).
The ppt will have a series of hypothetical situations and three choices of possible outcomes. For example:
"If you saw your loved-one on a date with someone else, you would...
a.) break up with them the next day with no explanation.
b.) approach them both and make a public scandal.
c.) walk away and pretend nothing happened. "
The groups are to guess what the person from their group would do in the hypothetical situation. When calling on students to give their answer, it must be spoken in the second conditional form and alternated for the correct context, such as changing 'you' to 'he/she'. The students from each team in the front will have already written a,b, or c on a piece of paper before their team members speak so there is no cheating. If the team guesses correctly, then the student will say "that is correct". If the answer is incorrect, then the student at the front must repeat the answer correctly. Keep a point chart on the board for each correct answer from the teams.
I've done this game with ages ranging from middle school school students to adults, and it's always a big hit in the classroom. The powerpoint can be further elaborate on and edited to fit your classroom needs,humor and cultural taboos.
I have been using this in Vietnam, and really wish I came across it when I worked in Korea because I can think of some great hypothetical situations to use with a Korean classroom. I will make a separate post on that subject ;)