Bahrain was the banking and corporate center of the Gulf Region, but United Arab Emirates has taken over that role. The ruling family is Sunni, but a lot of the people in the villages are Shia (like Iran). There is a lot of internal riots. There is a fairly large expat community of Filipino, British, Sri Lankans, Pakistanis, and Americans (almost all military. It is the base for the fleet).
Since they built the causeway over from Saudi Arabia a lot of Saudi men come over for the weekend to drink. Alchohol is never available in Saudi. In Bahrain a bar must be attached to a hotel, or you can drink in a restaurant. There is no drinking during Ramadan.