It is a good idea to get the attendance list for your next presentation some time before your presentation. It is important to ensure the logistics are taken care of in terms of the size of the room (available seats), but it will also support you to ensure that your presentation is tailored for the specific needs and level of knowledge of your audience.
Is your presentation tailored to the audience, based on the attendance list? Do you know the members of the audience? Can you remember some names, so you can easily do some “name-dropping” during your presentation? Can you do some research based on the names on the attendance list to ensure your presentation is perfectly tailored? The attendance list is a valuable piece of information that could be used during the preparation process for your next presentation.