There are things to do in Foxbat's Penthouse after you beat him up.
1. Go upstairs and talk to him to receive Foxbat Backup.
2. Talk to another him (on balcony) to receive Wonderous Bag (an infinite nerve-wracking bag that gives you perks for the number of times you open it).
3. Get the dead trouts in his fish tank. Ammo for slapping.
4. Interact with his cat on his bed. This starts a mini-quest. After you do this, go to his kitchen, get some cat treats, go back to the kitteh, and give him treats. This will give you the Foxcat (Googly-Eye) AF and the Furmidable [sic] title/perk.
Misremembered something, I think. You get the bag from the table on the balcony. The bag is just a monotonous click bait. You get perks at 100, 250, and 1000 clicks. Yeah, I'm almost to 1000.