The new Club Cool logo sign in Epcot uses colors that are more inline with US-based Coke branding, and not so much of the "future pop" look that the previous logo sign had.
The main attraction in Club Cool is the International Soda Wall. In this photo, I'm standing at the back of Club Cool in order to get a better look at the whole wall. When you come in the front entrance of Club Cool, the wall is actually on your right side, with giant floor to ceiling windows on the left.
The whole wall is full of these soda machines and tiny cup dispensers. Each machine (should) have the same eight Coke products from various parts of the world to sample. Sometimes, they may run out of a flavor or there will be a problem with the machine. Be sure to check all the dispensers if there's a particular flavor you're looking for.
How does this all work? Well, you just wait your turn in line and once a machine opens up, you just pull a little sample cup out of the dispenser and push the button for whichever sample you want to try. If you want to try them all, you can. If you try and fill a giant cup or mug that you have brought in from somewhere else, the soda guards will politely ask you to stop.
The various Coke products might change a bit from time-to-time, but they'll always try to have eight different tasting products to try. There's a description above each spout that states where that drink is from and outlines the flavor profile.
This is (more or less) what Club Cool looks like when you walk in the front entrance. The soda wall is on your right (obscured by the merchandise tables) and giant windows are on the left.
At the very back of Club Cool, there's a Soda Fountain, where guests can purchase ice cream and soda floats along with some frozen Coke-based beverages (non-alcoholic).
There's also a merchandise component in the Club Cool space. There's a couple of packages "snack food" type items here, along with various sippy cups and totes. The Disney-based merchandise is commonly available in other areas as well.
There is some Coke-specific themed merchandise in the Club Cool location, that you might not find at other locations in the park.
There's some Coke shirts, bags, and drink bottles in Epcot's Club Cool location... and even smaller items like bottle openers and change purses... a little Coke branded souvenir in every price range.