So, shop away if you need a wedding guest outfit or want to prepare for all the one-day/what-if events you’ve imagined. We’ve broken down the following 20 frocks by price — starting at $69. There are evening dresses with long sleeves for chilly nights, glamorous minis, and ones with show-stopping details. We don’t believe in the rule that you can’t wear elegant evening dresses once, so in our book, any piece is worth the splurge.