Continued Education credit
If your company offers Continuing Education (CE) credits for attending training sessions, ensure that everyone receives their due by taking attendance.
More types of activities
Teams by color
Split your participants into teams by color. Future questions can then segment responses by team.
Sales pitch showdown
Hold a sales competition, then ask the audience to choose the team that gave the best sales pitch.
Myers–Briggs questionnaire
Create common ground among participants by asking them to reveal their Myers-Briggs personality type.