Drinking
Drink plenty of fluids so that you don't dehydrate. Alcohol is not
recommended in high temperature zones in mid-day.
Minimum drinking age for alcohol is 18.

Security
People, cars & bags often are checked at the entrance to public buildings such as shopping malls, restaurants, theatre halls etc'. Be cooperative - it is for your safety too. Do not leave your bag unattended - anywhere.

Tipping
Tipping is accepted. The practice is to tip hotel staff, tour guides and
tour bus drivers. It is not customary to tip cab drivers.
As to restaurants, check the bill to see if "service included".
If not, 10 - 15% is a good bet.