A lot more than 5 is likely because Balticon audiences tend to prefer a more diverse range of program. At a media con 80% or so of the total audience people are in the main Ballroom watching the stars at any time. At Balticon it is more of a 50-50 split if a major event is in the main tent and the oposite at other times. I would suggest 20+ people at any podcast panel si likely.