Can I set up a meeting without blocking out the time on attendees calendars?
Yes. Create a New Appointment. Enter a topic and the time of the meeting in the Subject field. (You will not be indicating start and end times in the usual way). Check the box for All day event. Change the Show time as field to Free. Note that if you uncheck the Reminder box, the attendees will not receive a reminder message. Check the box if you want them to receive a meeting reminder.