Scheduling Conflicts

I was randomly in town one weekend and phoned up a few old friends who lived in the area. By chance not only were they all around, but a few other friends who'd moved out of state were also back. We discussed strategy and plotted, and agreed that we'd get together for drinks one night and a college basketball game the next. My friend Luke attended both events, but in the random spirit of the weekend, he'd already scheduled an intensive Scuba diving certification for those two days so that he could go diving on his impeding honeymoon. The problem for him that weekend is a rare one:  Too much awesome.