Watch the Calypso Strum online guitar lesson by Marcy Marxer from Ukulele for Guitar Players
The Calypso Strum Pattern is Down (space) Down Up (space) Up Down Up. The beauty of this strum is keeping it rolling along. Get the pattern down one time. Repeat as many times as necessary to play the exact pattern a few times in a row. Then try two in a row. Work up to 4 times in a row and then keep it going.
If you’re lucky enough to live with people, they will like this strum a lot for the first hour. After that I recommend using it with a specific song or finding your own private practice space. This is from personal experience.