The first time I went to a hadra was in Syria... and who was leading the hadra but the late Sh. Abdur Rahman Shaghuri. It was totally segregated, no drums or anything and for those who are still a bit confused there was no dancing (moonwalk, disco or whatever kinda dancing you lot have in mind)
Most of the times it was with Sh. Muhammad Yaqoubi; I didn't partake in them as I always ended up entertaining his kids.
Please note: You haven't been to a hadra unless its one in Syria : the Malays there have some energy or WHAT!