First, look at what the basic functions an advertisement [poster] such as this needs to perform?
These 4 items need to be clear and easily determined.
This ad fails where 2 and 3 are concerned.
Overall I like most of the color choices. However, grey on grey for some of the text is impossible to read.
As a sponsor, I'd be a tad upset that the line of text showing my company is impossible to discern from the background. I'd want my name much more prominent. What's the line under tasting read??? is everyone expected to squint and work very hard to read that? Same holds true for whatever that last line of text reads. I can't make it out.... so I won't bother trying. And the general public won't bother trying either.
The same holds true for the shadows "Friday Night March (13th?)" I only know it's the 13th because of your question. I can't tell if that's a 13 or 18 just by looking at it. This type fails miserably and performing its function.
Martini Glasses aren't for vodka. Few may realize this, but to be accurate Martini glasses may not be the best graphic to use.
I, personally am not a fan of the "ransom" lettering or the (let's not put any padding around the bullets) list items. But that's more my own aesthetic taste. Why there's extra right space after "Vodka bar" and "appetizers" but not after "DJ" leaves me wondering.
Overall, if contrast is addressed in the colors/type I think it's an okay image.