alt Hacker NewsI like the other posters more, but the first poster probably still conveys the idea of the event better: people having fun, drinking beer, with a live band. You don't get that from most of the other posters unless you first mentally transform those icons into real things, which takes effort.
I'm starting to think that icons are in fact the low-effort way to convey information. It's design you can just throw in anywhere without adapting it to context (except for maybe changing color).
I really don't get any sense of what these events are from the look-alike posters. They are all just a wall of color and excessive detail.
For a poster to catch your eye and be informational it needs to be way simpler - should be able to take it in at a glance, not have to pore over it like a "where's waldo" exercise.