I agree that seminars could be scheduled diuing show hours not a problem if the show floor is open for 8 hours two hours worth of seminars during the dauy would not detract from the show. As far as a tradind room suppose you had one that would accomadate about twenty people this way it might police itself ie: if someone was spewnding too much time or taking too much space nthe other traders would complain and hopefully get them to move on.