Because night clubs do not churn out terrorists but certain (not all) mosques (e.g. Lal Masjid) do. It is unfortunate, you see, that people started to view mosques as the training camps for terrorists. They are not entirely wrong and their fears are well-founded. We have to reclaim our mosques back from characters such as Abdul Aziz. Mosques are places of learning and not dedicated for saying prayers. In time of Mohammed (PBUH), Masjid Nabwi was practically like a club where Muslims and non-Muslims alike used to see the Prophet (PBUH), discuss all sorts of issues, and Muslims also used to say their prayers.