You're making a mountain out of a molehill. Nobody said these things have to be set in stone, the idea is just to try things and see if you enjoy them.

So it was cupcake tasting this week. You don't like cupcakes? That's fine. Next week it's yoga. Don't like yoga? That's fine. The week after that it's etc...

The way you want to paint it is that you have to like certain things to be 'one of us', the real message is that you can be different and still be 'one of us'. As I said before, you can't be all things to all people. The idea is to make things inclusionary by being fun, and I hope they continue, even if people want to make a point of being offended about eating cupcakes at a programming class.