From what I have seen they are friendly to you if you are a white westerner and/or female. I am not white nor female so I have not experienced any warmth or friendliness from them. Also I think there is blatant racism in Qatar. I recall one incident when I along with two Moroccan guys I know tried to get into a club at a hotel but were refused repeatedly on the basis that it was a 'couples only' night. A few minutes later a few white guys came along bought tickets and walked straight in. No questions asked. What is this all about?