负责举办某项活动或举行某次会议的组织或机构等organizers(plural)

• 现场车位有限，主办方建议游客搭乘公共交通。

  Parking at the site is limited, and the organizers recommend that visitors travel by public transport.

• 主办方对于耗资巨大、论文却质量平平的研讨会又岂能处之泰然？

  How can the organizers react with equanimity to a seminar that was hugely expensive yet produced mediocre articles?