Brunei is an Islamic state and is one of South East Asia’s most observant Islamic nations. Tourists are welcome in mosques, but only outside of prayer times and only when dressed conservatively – with men and women both wearing long sleeves and trousers – don’t forget to remove your shoes at the entrance. Smoking is prohibited indoors and while using public transport and public shows of affection should be avoided.
Brunei is not a country where tipping is accepted or commonplace. In fact it’s even rare to see service charges – though you may come in contact with charges of up to 10% in the country’s more upmarket restaurants and hotels – though this is generally always clearly marked. This spreads to taxi drivers who are not accustomed to receiving tips.