jon is just keeping an eye on the gangs for morningstar as a way of being useful as he builds his reputation and skillset as a bartender with the intention of eventually being able to work corporate events and collect information that way. We discussed this here! He's mostly watching gang members/leaders talk to each other and looking for evidence that they are planning anything that might pose a threat to morningstar or their interests, or anything that could threaten the city as a whole.