Collective nouns gather up multiple people or things and treat the group as a unit. Examples of collective nouns include army, band, bunch, committee, family, group, and team, among many others. Collective nouns are usually treated as singular:

My dinner every night at six.

The five members.

Collective nouns are often followed by phrases that specify what the group consists of: an army of ants, a band of brothers, a bunch of grapes. When a noun phrase of this pattern — “a singular of plurals” — is a subject, the verb is still usually singular:

An into the house.

The exception is when the members of the group are acting as individuals rather than as a unit:

My band of at the homeless shelter.