... the participants were divided into three groups, after which / where they discuss

[kohyoongliat]

When they had finished their lunch, the participants were divided into three groups, after which / where they discussed.their sales targets for the following year.

Which word/s should I use?

Thanks.

 

[MikeNewYork]

When they had finished their lunch, the participants were divided into three groups, after which / where they discussed.their sales targets for the following year.

Which word/s should I use?

Thanks.

I would use "where" or "in which", because they describe "groups".