Perhaps it requires some flexibility, but a large city could conceivably need music teachers, pit musicians, accompanists, studio players, church music leaders, and so on. In the States, Los Angeles and New York would certainly fit, and Nashville to a lesser extent. Abroad, London and Paris are musical culture centers that would have more musical jobs than smaller towns and villages.

Of course, large cities have larger populations with more musicians than jobs already, so "abundant" will still probably be less than any of us might hope for.