If you mean a club linesman the way they are defined, no thanks. All that does is make the Referee do it solo. Ok a small sided game I would rather be solo that have a club linesman. In fact small sided games should all be solo IMHO. But on a full field? Someone just standing in the corner holding a flag up if the ball goes out of play does nothing for me. Hard pass on a club line.
Now if you mean a linesman from the club by all means yes. The local club here is actively pushing one player and one parent from each team to take the entry course. I would even be fine with a modified course that teaches them nothing but offside and basics of balls in and out of play. Call it something clever like "grade 9 referee"

. I would be fine not even making them certified. Just teach them how to be an AR.
I would also allow for duals in tournaments and preseason events where having 3 is almost a unicorn.
Of course that will never happen. USSF is so busy tightening the screws on uncertified referees and all the wonderful new training they are producing to create high quality professional referees they would never consider allowing anything so heinous.