A beach-themed event is usually an outdoor soiree hosted poolside or by the ocean. However, certain beach elements, like seashells, can be brought inside to decorate no matter how far your home is from the shore. Almost any event can benefit from a beach theme, whether it's a wedding, birthday or shower. It's possible to expand the theme to include pirates, fish or elements of a Hawaiian luau. You can even host a formal event with a beach theme -- just be sure to provide guests with flip-flops if you're near an actual beach, as alcohol and high heels that sink in the sand can be a hazardous combo!