Zur (falsehood) includes all kinds of abomination, including polytheism, disbelief, festivities of polytheists, congregations for drinking wine and smoking, listening to songs and musical instruments, watching movies and such kinds of abominations. This meaning is stated by AlHafizh Ibn Kathir within his explanation of the verse quoted above. Besides, AlBaghawy (may Allah be merciful with him) mentioned a similar explanation when explaining the same verse.
He said that the origin of Zur is varnishing things and attributing false qualities to them. Thus, it is a coverup of falsehood in a way that makes it seem to be a truth. Hence, they embellish abominations by giving them false descriptions so that people would not resist but rather desire them. Thus, the one who does so bears the sin of his act and the sin of calling to it. Still a more sinful act than this is to call to it through words.