I would like to know if restaurants, lounges, clubs and places like that need a licence to play music. I'm a developer and I would like to develop a solution that would allow them to play music in a convenient way, but I'm not sure if this should be considered as a "commercial use". I live in West Africa, but I would like to sell my software in other parts of the world if possible so I would like a solution that is rather generic.
I can see that the prices for licences are quite high, so if I do need one, what solutions do I have? Do I need to purchase a licence for every single song, or is there any way to have a discount, a monthly fee or something like that? I'm pretty new to all this and I'd like to know who I should contact and how all this works. I've contacted Sony via their website but I haven't received any reply yet. However, I've seen on forums people claiming to have received a reply from Sony and having to pay over $2500 for a single song (to be played in a video).