Choose the right colored drink for your customers. Click on the drink in the cupboard, and then click on the green coaster the clients have in front of them, on the bar. Some colors, like purple, are not available in the cupboard. You will then have to mix these colors yourself. Mixing can be done at the angle of the bar (the dark brown part). Put two colored glasses down, click on the cocktail shaker, hold the mouse button and quickly move your mouse, until the power bar is full. Be quick enough, so that your customers won't leave the pub!