Drinking is not common for Senegalese people; however they will serve you when in a bar.
It is viewed negatively for girls to smoke in public.
When it comes to dating, guys almost always ask the girls out.
Guys tend to be fairly forward about asking a girl out, and a typical first date would be going to get a coffee, some dinner, or to the movies.
Personal relationships are highly valued, so it's best to not rush through greetings and maintain a positive and harmonious relationship with those you meet.