Where are those chess posters? I notice that they're quite common in European tournaments, but not so here. It's a pity as an online version, like that you see on my right sidebar, works quite well for websites. Thanks to Helen Milligan for providing this Queenstown one.
Below are some examples of posters I've spotted recently.
Obviously a full printed poster will be too expensive. But a simple online version, nothing too fancy, will do just fine. These can be quickly shared in any number of websites and provide any event that little extra visibility and promotion.