According to the Sims Wiki, the stadium "is where Sims can get a job in the Professional Sports Career or attend an Athletic class. Sims can spend leisure time attending sports game or concert here and as the theater, provides a cheap (if somewhat slow) way to get the Having a Blast moodlet. It also has weekly events such as the amateur olympics. This is one of the properties you can partner with and own in The Sims 3."
See also: School and Stadium.
World: Aurora Skies
Name: Competitor’s Delight Stadium
Size: 64 x 64
Cost: $115,000
World: Barnacle Bay, Hidden Springs, Riverview, Sunset Valley
Name: Llama Memorial Stadium (aka Fair Winds Stadium, Hidden Springs Coliseum)
Size: 48 x 55, 64 x 64, 46 x 55, 64 x 64
Cost: $115,000
World: Bridgeport
Name: LlamaCo Stadium
Size: 64 x 64
Cost: $115,000
World: Dragon Valley
Name: Tourney Tent of Novices
Size: 64 x 64
Cost: $115,000
World: Lucky Palms
Name: Lucky Llamas Stadium
Size: 64 x 64
Cost: $115,000
World: Lunar Lakes
Name: Aldrin Stadium
Size: 10 x 10
Cost: $115,000
World: Midnight Hollow
Name: Stately Stadium
Size: 50 x 50
Cost: $115,000
World: Monte Vista
Name: Coliseum
Size: 64 x 64
Cost: $115,000
World: Roaring Heights
Name: Sixam Field
Cost: $80,530
World: Sunlit Tides
Name: Seaside Sports Center
Size: 64 x 64
Cost: $115,000
World: Twinbrook
Name: Bachelor Stadium
Size: 48 x 64
Cost: N/A
World: University
Name: Schmidt Memorial Stadium & Annex
Size: 64 x 64
Cost: $115,000
Which is your favorite Stadium?