Hello, I am from and I am here to provide you with critique, helpful tips and hints, and also redlines/greenlines on this specific artwork.
Group on sofa: All the five characters bodies look pretty good, none floating or with odd anatomy. Very nicely done here! I just want to draw your attention to the arm of the first character from left to right (with the yellow glass on her hand), her hand should be nearer of her head, this arm position has a lack of mobility so you can hardly move your hand or arm to somewhere. And also to the last character's (the white one) neck, it looks (just) a little bit thin, male characters have a bulkier neck. Bottles: The Coca-Cola bottle and the other one on the side of the radio look a little bit out of the perspective, the fallen one is fine. Faces and expressions: You did a great work there! Everyone is expressive and we can see that all of them are (at least a little bit) drunk, you've managed to make them look silly, again I must say, good job! Lights and Shading: The lights are very well positioned, also the shadows, but the couple (on the bottom-right) have light coming from their right (from the viewer point of view), according to the light sources visible in the drawing it's incorrect, but if there is a light source outside of the drawing on his right so that's ok. Lifting someone: The major issue I could see on your work is in the bottom-right couple, the black haired character doesn't seem to have any difficult lifting the red haired one. It's like he wasn't doing any force to lift her up or it's like she weighs almost nothing. Unfortunately I couldn't find any references or tutorials to explain myself better in this issue and consequently I couldn't do a very effective feedback on the redlines/greenlines. When someone lifts a person (a furry in this case), this someone does some effort to lift the person up, so the person who is lifting tends to bend over backwards significantly and tense the arms (and also puting much of their force on the legs and generally separating them) to support the other person weight.
I agree that the characters arm is a bit off, hands and arms are something I've yet to master. c:
However about the couple, I wanted to make them look more like, drunk dancing or something, so I imagined the female kind of jumping while the other character is holding her, not exactly him lifting her. c:
But thank you for taking the time to critique my work. <3 I will surely keep these things in mind for my future drawings!