Northeners are famous (or is it notorious?) for their statements about how friendly they are.
Perhaps it is not true, and people are more friendly in the South.
At any rate, the word "cosmopolitan" is not the first that comes to my mind when the word "Lancashire" is mentioned.
I think that perhaps you need to meet such people as might have a more cosmopolitan background in your area. You might think of joining the Wine Society:
Not because of the wines, but because they have tastings around the country, and I believe dinners, and you would be more likely to meet people with your own interests.
Not much help perhaps, but a start.