If Theseus cooks well, Blaise will probably eventually meet him. Kingsly seems like the kind of person Blaise would feel like he could talk with (probably due to his upbringing and job). I look froward to seeing what will happen if they meet!
PJ and Blaise seem like an argument waiting to happen. Although Blaise knows of her husband from the Ministry, there don't seem to be many connections. Similarly, Molly and Blaise seem unlikely to meet, but who knows.
Blaise is a bit of a stick in the mud, so he is unaware of Terry's show. However as Blaise to has his clothes fitted, there is the chance of an encounter there. They seem to have a lot in common!