From StrategyWiki, the free strategy guide and walkthrough wiki

Again, at night, if you want to fight the fist fighters gang, you can. From the center of town when facing the tavern, go left past the tavern and turn right down the hill to the three warehouses you protected (or raided) as a child. You will find a similar set up to the gang in Bowerstone Quay, talk to the same looking guy to begin.

Again, you have to pay 50 gold to play, each hit you take is less gold you earn, at the end, you get the cash.

Just like before, these stats are based on a character with 0 strength. The more strength you have the fewer hits you will have to deliver to each opponent.

1. Round 1: 5 hits
2. Round 2: 8 hits
3. Round 3: 12 hits
4. Round 4: 15 hits
5. Round 5: 21 hits

If you don't remember how you beat them before, just remember to block, roll, wait for their third attack in their combo so that they have their back to you and then wail them.

When you beat these guys (perfectly) you will earn

400 gold

100 renown