Yes! All the time, actually. I have 3 everyday rings: the classic wedding set - solitaire ring and diamond eternity band, then a yellow gold/diamond eternity band for when I wear yellow jewelery (I can't mismatch my metals).
For formal evenings or parties, the fun part is switching out the everyday stuff for the flashier toys! Sometimes I'll stack the eternity bands with other rings, or leave the classics at home and go with different diamond or large cocktail rings.