If your LO has a cold, cough, run of the mill winter sicknesses, at what point do you continue to go to classes and activities, like music class, story time, children's museum?

I consider this stuff separate from daycare which is necessary, where this is just for fun really.

C has a cold with a cough still. I decide not to go to our class this morning but I'm getting stir crazy! Hopefully by tomorrow she will seem well enough to go out!