23 unique family reunion themes and ideas for a fun party. Perfect for any family event, our family reunion theme ideas include decoration tips, fun outdoor games, and party design ideas. Host a summer party with family reunion photo booths, a family BBQ cook-off, or a wild Western family reunion. Enjoy a magic theme, a fiesta, or a Hawaiian luau family reunion theme. Personalize the event with custom family shirts and plan fun activities like family trivia, a glow party, or a talent show.