The spa at Westlake Village Inn is amazing! They do book up though so plan ahead if you would like to schedule a treatment.
Tee times may book up so it is advised to call ahead.
Nearby shopping and dining.
There are several gorgeous beaches close to Westlake. This one is great for sunbathing.
Botanical garden in nearby Thousand Oaks.
There are some great options for wine tasting in the area including Cornell Winery, Strange Family Vineyards, Rosenthal Winery, and more.