First of all, when I look at the poster just quickly, the first thing that I notice is colors. Colors made the poster more attractive. So, people most probably want to look at it again to see what it is about. And then you can easily understand the point of the poster which is a meeting cocktail. You can clearly see that.
The point that I was a little confused is the written parts. The white written part of the purple is understandable whereas white written part of yellow segment is hard to read. But that yellow part is the part that has information about the meeting cocktail, because of that I think white part can be a different color in yellow segment.
To sum up, the poster is giving the main idea and information of it. That’s why it is quitely convenient to use.