In my country, especially after Shubuh prayer, on my mosque, always give a lecture first, and I ask my father about this matter. He said that the al dhikr is the first thing after doing prayer, is doing al dhikr (33 subhallah, alhamdi, allahuakbar and pray) because (my father told me) Allah S.W.T mentioned "Haqulminallah first (relationship to Allah.SWT) then Haqulminannas (relationship to humans) .
Now I'm confused, til' nowaday because the lecture's giver keep his lecture first without al-dhkir(dzkir), I know that al-dhikr is sunnah that according to history,that Muhammad SAW give the good news to The Poor on his time that cannot doing sadaqah because of his limited money or properties, but it's how beautiful islam (on that time) that how the poor Competing on Amal (goodness ofc.)