In a pari-mutuel system, bettors wager against each other, not the house. Every dollar bet on a horse goes into a communal pool. The track skims a percentage—the 'takeout'—for operations, purses, and regulatory fees. Whatever remains is divided among winners proportionally.
"Known as the Run for the Roses, the Derby is best celebrated with a touch of this classic floral choice. An overflowing centerpiece never fails: vary heights and add greenery to keep the arrangement loose and understated, and use sweetheart roses for a less expensive variety."