If you know what is best practice when running marketing meetings, you should always strive for the best. Even if you are not the one in charge or if someone else in the team has called the meeting, it is your job and in your best interest to start spreading the word of what effective marketing meetings look like.
Did you receive a meeting invitation without an agenda? Is the team coming to the decision that a meeting will be required to finalize work or make a decision about something? Be proactive and volunteer to help. For example, you could say, "Bob, I think having a meeting to review the new landing pages the agency created is great! If you'd like, I can help create the agenda and prepare for the meeting," or "Mary, I just received this meeting invitation and since it is related to a work I am currently doing, I wouldn't mind helping you prepare the agenda and think about the goals for meeting…".