Spectators are two-toned leather shoes.
The watch chain clipped onto a swinger's pants that kept him from losing his watch. Nowadays, you'll find people wearing wallet chains to simulate a watch chain, but it's not quite the same. Long chains that hang past one's knees or even ankles may look great, but they are very inconvenient and sometimes dangerous to dance in. Another thing, suspenders hold your pants up, so do belts. Therefore, it's one or the other, not both.