Jacob's Fight Club Outfit is what he wears in the underground fights run by Robert Topping. It is an activity outfit rather than one you equip for bonuses.
Topping, born in 1847, grew up partly with a travelling circus before working for an uncle who ran illegitimate businesses. By 1868 he is an associate of the twins, who regularly take part in his races and fights.
Aveline (Evie)
The Aveline outfit gives Evie Frye the look of Aveline de Grandpré and adds three to each tool capacity. It comes from the Ubisoft Club.
Ballgown (Evie)
The Ballgown is the formal dress Evie Frye wears to infiltrate the Queen's ball.
Baron Jordane's Finery (Jacob)
Baron Jordane's Finery is an upper-class suit for Jacob Frye that lets him carry three more of each tool: throwing knives, hallucinogenic darts, smoke bombs and voltaic bombs.
Blackguard's Suit (Jacob)
The Blackguard's Suit is a dark blue and black Jacob Frye outfit that cuts the melee damage he takes by 20%.