Sometimes accompanied by dinner, campfire is just a party outside open to active members, pledges, alumni, and significant others.
Members go to dinner before hand with their dates, then to formal where they dance the night away.
Each semester, the pledges are required to plan and host a party. We typically rent a cabin where we all stay, and go hiking, skiing, swimming, and participating in many other fun activities. We have numerous parties through out the semester just because we can and want to, engineers need to party.