Okla. Stat. tit. 11, § 11-33-104: Joint establishment and conduct of system of

recreation.

Any two or more governmental units may jointly establish and

conduct such a system of recreation, including recreation centers,

parks, swimming pools, playgrounds and any and all other

recreational facilities and activities, and may exercise all the

powers given by Sections 33-101 through 33-115 of this title. The

respective governing bodies operating such a joint program or

programs may provide by agreement among themselves for all matters

connected with the program and determine what items of cost and

expense shall be paid by each. All such facilities and activities

shall be governmental in nature, and no liability for negligence

shall accrue against any participating governmental unit.