You have six friends over to your apartment for dinner and drinks. three of the friends are discussing einstein's theory of relativity, while the other three are talking about the world cup. according to georg simmel, is this a party yet?

No, because there are only two topics being discussed.

According to Simmer, to be considered as a party, it would need at least three-way topic that being discussed among it's members.

If the topics are only two or less, it would be closer to be referred to as a conversation rather than a party.