Seems like getting the grumblers a drip pot (ooh, one button?) or french press might be smarter. You can make a LOT more mediocre coffee that way. I don't know if it's been clarified yet, but I did want to make sure you know that pulling 8 oz. of water through a double shot's worth of coffee is not going to produce a rich anything, no matter if it goes through 1 hole or 800. The coffee extracts optimally with ~1-2 oz. at 9 bars of pressure. What this means is that, if you continue to pull water through after ~2 oz., you get over-extracted coffee. It's so bitter and awful that your worst espresso shot (I hope) doesn't even compare to it. If you think that a crema enhancer is going to help this at all, I can tell you right now that it will just be lipstick on a pig, to quote a presidential candidate (or both).
What's the trouble with pouring 6 oz. of hot water from the tap into your mug and microwaving it for 30-60s while you prep the shot? It's not hard, it's not any more trouble, and it will yield a drinkable cup of coffee. Crema enhancer schmema enhancer. You're not going to get a decent cup of coffee drawing 8 oz. of water through 2 scoops of coffee grounds on Silvia no matter what you do.
You've got to preach the good word about good coffee! Stick up for it! Send your wife to McDOnald's if she doesn't want proper coffee!
