Some occasions call for many cups at once, and for this nothing beats the convenience of an automatic coffee brewer. Be sure to follow the machines brewing instructions to measure the right proportions.
Also, be sure to ask your barista to grind your coffee for your specific filter type. Here are 2 common types.
Use a medium grind, that is a little finer than kosher salt.
Use a fine grind that should be slightly finer than the flat-bottomed filters.