ask (someone) round

To ask someone to come visit one's house. Why don't you ask John round later for a cup of tea? I asked Mary round to watch a movie, but she was busy. Maureen's so nice, she always asks me round when she senses that I'm sad.

ask round

To try to find out information about something by asking a lot of different people. Primarily heard in UK. I've been asking round to see if anyone is prepared for our Biology final, and the consensus has been a firm "no." A: "Have you seen my book?" B: "No, but I'll ask round." Please ask round and see if anyone can stay late to help us wrap this up.