The fact that the girl didn't look up much from the bar didn't really phase Ragmar. If he only ever went after girls who were immediately interested he would have given up long ago. What he lacked in traditional good looks he made up for in persistence.
"We're celebrating my being named the new Manager for a Quidditch team," he said proudly. He didn't say they were the Cannons. It would sound much more impressive in the moments before he let her know which team he was managing. Unless he managed to find himself a certified Chudley fan, in which case, maybe he'd be luckier than he thought.
"I figure a drink with a pretty lady is the best celebration possible."