Midnight Fight Express

If you need to grind it after a full playthrough I found it easiest on the first level Factory on the second room after you enter the building as the large bozo only arrives after you've killed the other enemies in the room. Once he arrives run away then towards him then he should grab you, escape, run away slightly then he should try to grab you again, repeat as many times as needed.


*Game clip added at time of solution

Metro Station, after crossing the second walkway across the trains and before exitting towards the toilets you'll come across a heavier, 'bulky bozo' character who will grapple you. Escape this but don't kill him and rinse and repeat. If you die you'll checkpoint here so you can just keep grinding this one out here on normal.

As an addition to the two great guides above, once you break a grapple, run away and turn your back to him, that will almost guarantee that he will go for the grapple rather than the parry attack.