What do we call a contract that can be legally enforced at the discretion of one or more parties involved, but not necessarily by all parties?

Explanation

A void contract has no legal effect from the beginning, while a valid contract is fully enforceable by all parties. A voidable contract, however, is initially valid and enforceable but may be rejected or affirmed at the option of one or more parties involved. Therefore, the correct term for a contract enforceable at the choice of some parties but not others is a voidable contract.