I agree, even though it doesnt matter how many g&t's I make I dont make any extra money.
If I havent finished the service, or am in the middle of something I always pop their call bell on and write down what they want and just tell them it may take a few minutes but its not a problem. Even if it erks me a lot I have too much pride in myself and my job/airline to give anyone a frosty look for asking for something via their call bell.