When it comes to catering an open bar, or even a cash bar for a wedding or some other special event - Bull River Beverage AKA Chu's Liquors are the guys I recommend!
They catered my wedding with an open bar (thanks to my father in law) for about 450 people. Being the groom, I was all over the place, but heard compliments from everyone about how great the bartenders and drinks were.
They had enough stations to keep the lines short and came prepared with all the top shelf bottles we needed.
And on a casual note, they have a great wine selection. They have helpful standouts that point to the top-rated, good price items. Perfect for me, cause I'm no wine connoisseur. I'm just glad they always have a fresh selection of limes for my Corona's on the way to Tybee Island.
Pros: Wide selection and full service catering available
Cons: Not open Sunday's..