How do I limit how many songs each guest requests?

Open Manage → Settings → Details and set Song requests per guest. It can be from 1 to 50, and every event starts at 10. The field shows only while song requests are on.

A guest at the limit can still vote for songs already on the list. Lowering the number keeps every song already requested; it only stops new ones.

Songs you, a co-host or your team add are not counted.