I’d use them for mulch rather than throwing them on the compost heap. Does wonders for controlling a variety of pests.
They can… it’s just nobody wants to clean the brushes afterwards.
Create a cockroach trap!
It was all over the local television news this summer when there was an infestation of cockroaches around the Las Vegas valley…(combination of summer heat and rain and all…)
You take an empty glass jar, put in fresh coffee grounds and just a bit of water, and either place the jar next to a wall (so the critters can crawl up and get into the jar) or put some masking tape around the jar so they have traction to climb up from the outside.
Once they fall into the jar, they can’t crawl out.
Seems cockroaches like the smell of coffee and it attracts them in hordes. Seemed to work here and lots of people wrote into the television station to thank them for the tip.
I have always heard that coffee grounds tilled into the garden fresh, as opposed to composted first made the worms very active. Since worms procreate according to their frequency of interaction, a bunch of coffee freak worms will work the heck out of your garden. Might all be a pack of farmer lies, I don’t know. I have a black thumb.
Tris
They’re rich in nitrogen, so yeah, they make great plant food directly to the soil, you don’t have to compost 'em. Scratch them into the soil a bit instead of just leaving a pile, but they’re great stuff.
Ahhh… so that’s why there’s so few arrests of vomiting burglars.
If you dry 'em out, you can smoke 'em in a pipe when you don’t have any money for tobacco and you’re desparate for a smoke.
You can also mix them with tea and roll a cigarette that tastes surprisingly normal.
Was it Starbucks or Folger’s?
Ah memories! This thread made me think of poor college days. Making a pot of coffee in the morning and saving the grounds to reperk (add one teaspoon fresh coffee) that night while studying.
What? I didn’t say it was a good memory. 
Witnessing belongs in GD, where we can debate the worship of Starbucks versus other, superior, caffeine providers.
Around three years ago my electric coffee maker broke and I switched to a French press. My routine now is every morning I get up, but some water on to boil, pour a little water into yesterday’s coffee grounds still in the press, take them outside and dump them around the plants. It certainly hasn’t hurt anything and the grounds seem to immediately incorporate into the soil.
I tried “mulching” some of my indoor plants with coffee grounds but it molds. Can’t recommend that.
Could you name some of the pests I’m controlling? I’ve never heard that.