Here is the situation: Jack lives in a country, in which COVID-19 is still raging. A two-week lockdown has already been lifted, which had been imposed due to several cluster infections in Jack's town (in total 7 clusters had been identified by the local authorities, 12 infected people in each cluster), but the government still keeps strict restrictions on how many people can gather together in one eatery at one time. Jack has been invited by his friends to a café. Jack is aware of his friends' light attitude toward government's restrictions; however, he himself is very serious about it. Jack is aware of the fact that the government still keeps some gathering restrictions for the residents of his town, but he doesn't know precisely (that is, he doesn't know exactly how many people are allowed to gather together in one eatery at one time). So Jack enters the café that he has been invited to and sees all his friends sitting around one table and cheerfully reacting to Jack's arrival (they know about Jack's serious attitude toward observing the government's restrictions and, therefore, suspected that he might've not come). Jack, however, is not that excited. Instead, he asks his friends, "Can this be considered a cluster?"
All Jack wants to know in this question is whether or not the number of gathered people around the table (that is, all his friends and Jack himself) falls within the limits allowed by the government.
Is Jack's question clear in this example? Is it clear from his question what he wants to find out? Is usage of the word "cluster" correct in this case? Or, perhaps, it still needs to be modified by some adjective or maybe even replaced with some other term?