Party City 27110 Alicia Pky, Laguna Niguel, CA92677 Party City is America's largest party supply store. The long aisles are appropriately organized by event, holiday and…More color. There are Sweet 16 party supplies, luau themed, Oscar party, Super Bowl, baby and bridal shower, bachelorette party and over the hill birthday. There is a mylar and helium balloon station with a large selection of colors and themes. Festive piñatas line the ceiling, and the front and back of the store are usually reserved for the latest holiday decorations. A generous offering of tabletop decorations including plastic dinnerware and paper products complete any special occasion. Discounts are offered to all schools and non-profit organizations.