Hi! I'm raised in Hawai'i, and can explain. In Hawai'ian slang, "cruise" just means to go for a drive, hang out, with your friends. On the islands, there isn't much in way of public transportation and so being able to get around by car is essential to life there. When you are just driving around (with friends in the car) on your free time, for fun... looking for fun things to do.... just hanging out, basically in a casual way. There is no connotation of "looking for sex" - it just means going for a drive, for fun....