Bob Marley and the Qatari Wailers

It's well known that Qataris don't frequent bars, except when they do. And then, they don't wear National dress, except when they do. And of course, they don't drink alcohol, except, you've got the pattern, when they do. And after all, why should they not, in their own country? But here's the greater mystery: when the spirit moves them to make a request, nine times out of ten, it is for Bob