I have a little experience in this area, and I agree with Millicurie. Unless you are opening a supper club or dinner theater, music will just be background noise and no one is really going to notice the quality of your music delivery.
Also, with such a large area you are probably going to require multiple speakers and placement will be more for even coverage than best musical fidelity. There are decent commercial speaker systems that sound OK - not great but probably good enough under all of the talking, plates dropping, waiters and bus staff.
Good luck
Also, with such a large area you are probably going to require multiple speakers and placement will be more for even coverage than best musical fidelity. There are decent commercial speaker systems that sound OK - not great but probably good enough under all of the talking, plates dropping, waiters and bus staff.
Good luck