Ushers must learn how the seats in a given venue are numbered or alphabetized. In some cases there are no reserved seats and ushers merely help people find seats. In darkened theaters ushers frequently use flashlights to guide them. They also pass out programs, answer questions about performance times, and remind patrons to turn off cell phones and beepers during the event. Ushers make sure that fire exits are clear and unlocked. In the case of an emergency they help the people leave the theater in a safe, calm, and orderly manner.