I can remember back in the 70's or maybe it was the 80's, crocheted collars that looked like doilies were very popular to wear over dark-colored dresses. I had one that I wore over a high-necked green velvet dress I had. It really dressed it up. Ladies would also stitch smaller ones onto the fronts of dark sweatshirts.
When decorating furniture got popular, people would place a doily on top of a piece of furniture and then spray paint on it. The design would go through the doily and make a lacy design on the furniture.
And of course, the crocheted tablecloths were very popular. I bought a white one and then soaked it in tea to get the ecru color I wanted. I used it for years on my 120-year-old oak dining room table.