Possible Clues:

• Some large jazz ensembles
• The nights of Hanukkah and the legs on a spider, for two
• Double foursomes
• Sets of black or white pawns, e.g
• Pairs of four
• Large singing groups
• Stable electron configurations
• Eight-person bands
• Groups with one more member than a 94-Down
• Mendelssohn work in E flat major, and others