Since Qatar is a Muslim country, any alcohol you carry with you will have to be checked into one of the airport's lockers and you can pick it up when you are leaving the country. The only places you can get your hands on alcohol is at upscale Doha restaurants and bars. Opt for modest clothing, whether you are male or female. Body parts such as your shoulder and knees should be covered and your clothes should be loose. This also gives you better protection against the harsh sun. Refrain from taking pictures of anyone without their permission. Arabic is the official language of Qatar, however, English is a commonly spoken language so you should have no issue communicating with residents in the country. Oh and spitting anywhere in the country is liable to a fine of two hundred Qatari Riyal which translates to approximately thirty-four pounds.