My story has several occasions where the two main protagonists interact with background characters. I'd rather not make a different background character for each one, as each needs a decent amount of character building. Would it be too repetitive to include the same background character in each scene, with exceptions?
Could I somehow put a funny run-in twist on these meet-ups or is it too coincidental? On a side note, a lot of these interactions are in places far away from each other.