Norms for photo/model shootouts

For those who attend community shootouts (where people wanting to pose and people wanting to take photos, and potentially HMUAs and/or wardrobe artists as well, connect and take photos together on-the-fly), what have the norms been for the sharing and usage of the photos?

Please share which role you've filled and also which country your answer pertains to.

Some questions: How fast do you expect the photos? How many photos do you expect? What usage of the photos do you assume to be appropriate/inappropriate? What are the expectations for crediting the parties involved? Is there a pre-written agreement for all attendees, no agreements at all, or the expectation that each attendee will bring their own? And what other pertinent questions would you like to ask the community here?

Discuss!