This extremely depressing chapter is Katerina Ivanovna’s experience of her dead husband’s memorial meal.
Almost no one comes. Even the neighbors she looked down on don’t come. Only a few opportunist and disabled hungry people come to eat the food and drink the booze. Raskolnikov comes and is basically the biggest person at the party so she sits with him and says lots of sad poor-people-proud things to him about how her family came from better circumstances. She wants everyone to know that they are “better” than their current downtrodden circumstances. It’s super, super sad.
She keeps arguing with her landlady (who has done a lot of work for this party) and they finally almost have a fist fight. Just then, Pyotr Petrovich Luzhin comes in.