我曾经在某政府部门的共青团办公室做过3年的团委副书记，全职的，想用这段经历写LEADERSHIP, 其实也不过是组织几百个团员搞点活动，倒是有发挥的余地，但不知共青团是否敏感话题，政治色彩太浓，会有负面作用，请指教。

It should be OK.Try to find the activities which have little political purpose.

What roles you have played in those activities and What you have learned from those events are expected to be emphasized in your essays.

U can explain it as community services.