Coffee and compost go hand in hand. Plants like roses and vegetables like tomatoes will do well with coffee grinds. Also plants that like acid soil such as gardenias, azaleas, etc. will also like coffee grinds. Hot Coffee can be sprayed directly on most insects and caterpillars, grasshoppers, etc. When you spray with the hot coffee, water is cooled down upon contact with the air enough to damage the insects but not the plants.
Insects require only a small change in the body temp to die.
Hot coffee will also damage fungus spores upon contact. To increase effectiveness of hot coffee you can add a dash of milk, or sugar or soap or Tabasco or essential oil. This mixture can be made by allowing your compost tea to sit for a few days. It should be sitting inside a glass bottle allowing the sun to shine thru it. This increases the bacterial levels as well as the energy levels of the tea not to mention the actual temp of the water.