Xavi's idea was to get the learners to produce their own 'would rather' cards and bring them to class for a fun warmer/revision activity.
If you need some examples, you'll find lots in the link I posted on Twitter about a month ago:
— Tom Walton (@Tom_IHBCN) September 2, 2014
If you were using a WhatsApp group, it would work great there, too. Try challenging your learners: who can come up with the best 'would rather" — i.e. the one that produces the most replies?