One of the more popular forms of stroke play competition, at least in the USA, is the "scramble".  Three or four person teams compete against other teams.  Each player on a team plays a tee shot, the team decides which is the better ball, and then each player plays their next shot from that point, and so forth until a ball is holed out.  It is interesting to me that "scramble" is not included in the USGA Rules of golf.  Under forms of stroke play, all I see listed are:
Forms of Stroke Play
Individual:  A competition in which each competitor plays as an individual.
Foursome: A competition in which two competitors play as partners and play one ball.
Four-Ball: A competition in which two competitors play as partners, each playing his own ball.  The lower score
of the partners is the score for the hole.  If one partner fails to complete the play of the hole, there is no penalty.

Am I missing something here?  It would seem to me the USGA either ignores this form of stroke play competition or has just failed to keep up with the times.