Drinking is acceptable, but you should avoid getting drunk. Smoking is also acceptable, but it is not allowed inside public buildings, restaurants or bars serving food.
When invited to a home, you should always ask the host if he/she doesn't mind you smoking inside before doing so.
In terms of dating, both men and women are allowed to take the first step. However, it is still more frequent for men to take the initiative.
First dates can vary according to personal interests (drink, dinner, dancing, sports).