Hadith: Rich get to heaven 500 years after the poor. (Or worse, if that is multipliable with some time-relativity, such as 1000 times.)

Hadith: Dining with friends (or, open to all people) is free from Judgment Day accounting.

The Islamic-party concept is thus overlapping with the concept of (Islamic) fun. While fun is optional, for some of us, Islamic-party is almost necessary -- that is, for lessening or nullifying the other-worldly cost of what your stomach sees. The formula is to

• keep your income valid (what Allah would not punish)
• choose halal food
• have party with friends -- or, with any people how Abraham (a.s.) was having all the time

Islamic-party is not only about food, but the food case is what goes beyond fun, thus, worth to tell, first.

The Islamic-party attitude of talking together, is to talk what is worth to talk. (A business lunch is normally with a topic, but that is the case for non-business gatherings, too. Talking of Islamic content, is a type of other-worldly business, and without that (or, without salawat?), a gathering is probably a waste or worse.)