Shut UP!
People are free to talk and laugh at cafes. That’s where people hang out, after all, and what’s the point of meeting up with friends if you’re just supposed to stare at your phone the entire time and not socially engage? However, there’s a fine line between tolerable noise levels and being obnoxiously loud, and this group of friends passed that line several miles back.
The OP, who was understandably irritated by the group, wanted revenge. So, when he heard that the group had come up with the name for their business, the OP immediately purchased the domain name. Two wrongs don’t make a right, but that group of noisy friends totes deserved it.