From the first impressions of the poster we can simply imply that the film is a comedy. We can do this because of the light-heartedness shown, one example of this is the baby with sunglasses.
Furthermore, the poster shows three men who are appearing to suffer from a hangover and the picture also suggests they don't know what they are doing because of it. This also suggests that the film will make people laugh and is of comedy genre.
Moreover, the film is targeted towards an age group of 15+ because of the particularly rude parts throughout the film. Also, the lighting at the back of the shot adds a light-hearted effect to the poster. Also as the bright light has connotations with comedy it gives a good impression to the audience about how the film will be and also attracts them in.
Overall, this poster attracts a specific target audience well. Using different features throughout the poster for effect. Eg. The light in the background and the baby. This gives the audience an insight into what they can expect from the film and entice them to want to find out more.