"No, not with the boys"

[alexsovich]

Both Jungs and Jungen seem to be accepted. Does this vary according to the region?

[Relevart090]

Both are OK. The only slight difference is, that Jungs is more informal.

[javierrincon]

Interesting example. Thought Jungen would be M as its singular form. Guess not, it´s unidentified

[_Katrina_]

den Jungs...we use the article "den" for the plural dativ form.