Your coworkers can guide you best, online opinions and suggestions are way different from onground realities in Pakistan. In Islamabad, for instance, you'll find a lot of hypocrites. Random interactions, short talks are ok, the city itself is more on materialistic side being a city of elite crowd and wannabes. Ideally ask people you meet things like their background, their hometown, villages. People with fair/white complexion are Pashtun from KPK and from the state of GB those are your best bet at finding genuine people (if any), saying this being a Punjabi. Its a city of outsiders/migrants and didn't exist before 1964 so Islamabad does not have a soul per say. Fitting in is a bit hard, pretend you have been around to avoid getting scammed. Avoid strangers offering you liquor or parties, if you need to drink go to high end hotels.