It might sound funny, but it is absolutely possible to come across an Arabic DJ, based on whether you are holding an event which might require such form of entertainment. It is important to note that since people are living in a cosmopolitan society, it is prudent to also assume that there is great possibility to encounter various races and religions in the most diverse of places. An entertainer who delivers his products in Arabic is one who is likely to be found in events frequented by those who understand the dialect. You need not necessarily be of the same language group but so long as you understand and appreciate it, then it is ceases to be a major impediment to your attendance.
Also, it might not come as a surprise to encounter a Greek DJ, considering that in any cosmopolitan setting you are bound to encounter activities referred to as theme events. People sharing the same tradition, culture, dialect and in some other times religion meet to socialize in such. The type of music or any other form of entertainment found in this setting is bound to be in accordance with not only the environment but also mood of the place. As mentioned earlier, you need not be a member of the said community so as to attend such activities, as it is the appreciation of the various aspects being brought out here which endears non members.
Different communities and religions in both foreign and their own land often meet for the appreciation of their way of life. It is in these places where you are most likely to find disc jockeys dealing in the delivery of products that are at par with the receptors.