MB3 185b: Riding, Swimming, Clapping and Dancing on Shabbos (339:1-3)

Riding an animal on Shabbos is prohibited. Swimming is prohibited since it you may come to make a liferaft, even in a pool.

Clapping and dancing on Shabbos are prohibited since they could lead to fixing musical instruments. Does this still apply today when we don't know how to fix instruments?

Clapping during davening.

(Why we don't recite Kiddush Levana on Shabbos.)