I'm at my favorite club the other night and it's prime time. Johnny Polanco's band is burning and the floor is crowded with sexy couples. I find a spot that's smaller than I'd like, but very workable. Then, this guy comes on the floor next to me and starts dancing like he's the only one on the floor. He throws his partner into me, and then into my follow a few seconds later. My partner was unhappy, and the look on her face showed she was very uncomfortable. I spent the rest of the dance in defensive mode, keeping my partner away from him so I would get bruised instead of her.
My partner thanked me for protecting her, and this guy's follow apologized to me when the dance finished. I assured her that I knew she's at the mercy of the lead, and it's not her fault if she gets danced into another couple. This idiot was clueless. He hit me and others while throwing his partner around like a rag doll, and one couple left the floor because they got tired of being stepped on. But he was in his own world; I'm sure he thought his partner was impressed with his "cool moves." He never said "sorry" or acknowledged that he had abused others around him. He simply carried on as if he were full-blooded royalty who owned the place, and the rest of us pawns should've been genuflecting, groveling, and respectfully leaving the floor to its rightful king.
He had a table of four guys with him and they had to see the destruction left in his wake. But nobody pulled him aside and said "Hey, when it's this crowded, you need to dance tighter."
It can be sooooo simple: Try taking smaller steps! And practice your dancing assuming you have limited space. I've seen some fantastic couples grooving in postage stamp-sized areas, and I've come to respect the skill involved.
If your friend is dancing inconsiderately, be a real friend and let them know. As long as this guy remains clueless, he’ll do it over and over. Somebody needs to lend him a clue, and since he’s your friend, let him in on the secret that everybody else knows.
If I'm not in bed by eleven at night, I go home.