Can anything be done with used coffee grounds besides throwing them out? Alternative energy source, maybe? 
That great god of all things coffee known as Starbucks has taken to packaging their used grounds for home gardeners to use as a nutritious mulch.
I’m told that sprinkling coffee grounds on rose beds makes them grow quite well.
I saw them used as ashtray “sand” once.
At least I hope that was an ashtray…
I compost mine, too. Don’t know if they’re any better as a mulch than anything else, because they go into the compost bin with everything else and just disappear, thanks to the triple miracles of of bacteria, worms, and flies.
Here is some great info on using used coffee grounds.
A worm farm!
Get a box, line it with a plastic bag and fill it with dirt and earthworms, and you’ll have a convenient source of bait when fishing season rolls around. Just toss the old coffee grounds (maybe even the filter, depending on what kind you use) in the box every day after brewing a pot and mix it up a bit every now and then. I don’t have enough time to make it worthwhile anymore, but I was never without at least two or three worm farms as a kid. It was so much easier to come home from school, reach into the box and pull out a handful of worms to go fishing than it was to dig around in the hard earth with a shovel and no guarantee of getting many worms.
Mushroom growin’! I have a coworker who’s into mycology, and for a while there he was taking the used grounds from the work coffeemakers home to use for his mushroom colonies.
It makes great imitation blood for vomit and feces, simulating someone with internal bleeding injuries.
This may not be a use everyone has a high demand for. Otherwise, I would go with the compost idea.
Well, that’s… special. Can I ask how you came up with that?
… that vomited.
…who vomited.
Not me. I haven’t thrown up since June 29th, 1980.
Ok.
I’ll bite.
Give.
Sure it’s not 1994?
14 years down the drain.
One summer I kept throwing them on a philodendron which started to grow monstrously fast.
I recently certified as a wilderness EMT. Actually, internal bleeding is now the first thing I think of when I hear the words “coffee grounds.” This is probably because I’m also more of a tea drinker. 
Thanks for the link!
When my mothers ulcerations went nuts, she had me call the hospital she worked at, and tell them she had “coffee ground emesis”. I was taking Nurses Aide classes, so I knew what emesis was (puke).
Later, I found out that coffee ground emesis is called that because it looks astonishinly like wet coffee grounds.
In case anyone was wondering.
Hard to say - they can’t actually dust for vomit.