Half the crew want their Open Water card, the other half just want the beach and the bars - Koh Tao is built for exactly this. Four of us do the course over three days while the rest snorkel and nap; we all meet for sunsets, the night out, and the fun-dive day at the end once everyone's certified.
Tom organised this one. “Book the course as a group, keep the bar nights to the days you're not diving, and let the beach people do their thing - works every time.”