One popular 25th anniversary party idea is to use silver as a theme. To make the most of this theme, drape the tables with silver drape, and send out invitations in a silvery cylinder with confetti. For the menu, choose foods that would appeal to guests, and serve cupcakes in silver wrappers.
Using Greece, a popular honeymoon destination, for inspiration is another great anniversary party idea. Send out the invitations for the Greek fest in a papyrus scroll to give an authentic feel. Decorate the home in shades of white and blue. Any Greek food, from tzatziki to stuffed grape leaves can be served. The dessert could be a wedding cake baked to look like their original wedding cake.
If the couple wants to relive their old memories, then having an 80's retro party is perfect. The guests can come dressed like their favorite 80's icons. It is nice to have a photo booth at the party to capture the fun moments. Make sure to have some classic music from the 80's playing from artists like Madonna and Michael Jackson. Alternatively, one can also host a Las Vegas style anniversary party right at home. The theme can include glitzy invitations, "The Hangover" inspired clothing and casino games to set the mood.