Why the article is not used before "playgroup"? I thought "a playgroup" or "the playgroup" is right here.
"Playgroup" is a noun that can be either countable or uncountable. In this context, "playgroup" is uncountable because it is referring to the concept of being at playgroup rather than the place that they go to have playgroup. Since "playgroup" is uncountable here, it does not require an article like "the" or "a" in front of it.
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