[Chris is me]

Don't have long meetings unless there is a large volume of specific tasks to be done in the time of that meeting. Meetings where the tasks to be done aren't clear should not be more than a few hours.

The reasons for this are simple:

1. Time is a finite resource, and I don't mean in the sense of "there are 24 hours in a day" time. I mean that, people will only be able to productively output a certain number of hours of time into the robotics team a year. Time you are using to have robotics meetings is time that person is not studying, resting, working, or otherwise not spending on robotics. Managing burnout is critical.

2. Long meetings without an active plan are really not more productive than shorter meetings without an active plan. People get bored and lose energy. People get lost and unmotivated. Long meetings should be reserved for those contingencies when a deadline approaches and everyone knows how to proceed.

If you do it right, you might actually find that your team is MORE productive when meeting for dramatically less time. Don't just max out the calendar because you can.