Praise be to Allah.
We put this question to Shaykh ‘Abd al-Rahmaan ibn Jibreen (may Allaah preserve him), who answered as follows:
He should look at what is customary (al-‘urf) and at the usage of the word ta’mah (feeding the poor) in those days. What was usually meant by it was to offer iftaar and dinner to fasting people, even if it was only three or five poor persons who were in need of iftaar after fasting.
And Allaah knows best.