Although it is legal to purchase or drink alcohol, minimum age requirements still differ across regions. Minimum age to purchase and drink alcohol is 18 years old.
Blood-alcohol limit is 0.08% (0.8g per litre of blood) while driving.
Drugs (including cannabis/marijuana) are illegal & criminalized which means you are risking jail time with other penalties (fine, community service, rehabilitation) if you are caught.
Prostitution is legal (in a way of exchanging sex for money). Brothels are illegal.