The 20's

On Him:

Mossimo tank top, $9.99; Target; target.com. Pants, $69; American Apparel in Studio City, americanapparel.com

On Her:

Volcom striped one-piece swimsuit, $90; Diane’s Beachwear in Calabasas, dianesbeachwear.com. Necklace, $78; Anthropologie at Westfield Topanga, anthropologie.com. Earrings, $9.95; H&M at Westfield Topanga, hm.com/us.

The 50's

On Him:

Penguin swim trunks, $69; Bloomingdales at Westfield Fashion Square in Sherman Oaks,  bloomingdales.com. White shirt, $64.50; J.Crew at Westfield Fashion Square, jcrew.com.

On Her:

BCBG blue bikini, $96; Jill Roberts in Studio City. Shorts, $48; American Apparel in Studio City. Earrings, $9.95; H&M at Westfield Topanga.

On Her:

3D flower bandeau top, $30, and bottom, $30; American Apparel. Board courtesy of Nikau Kai.

The 70's

On Him:

Topo Ranch tank top, $39, and Travis Matthews shorts, $80; both at Bloomingdales Westfield Fashion Square, Sherman Oaks. Steve Madden shoes, $49.99; Macy’s at Westfield Fashion Square, macys.com. Sunglasses, $7.95; H&M at Westfield Topanga.

On Her:

Eberjey white bikini, $156, and straw bag, $38. Both at Jill Roberts, Studio City,
jillroberts.com. Necklace, $25; Macy’s at Westfield  Fashion Square. Large stone cuff, $24; Free People, Westfield Topanga, freepeople.com. Floral head wreath, $10.50; Claire’s at Westfield Fashion Square, claires.com. Vintage 93 platform shoes, $48; Francesca’s at Westfield Topanga, francescas.com. Bangles, $5.95, and gold ring, $5.95; both at H&M at Westfield Topanga.