I once drove a group of bochurim, and I enjoyed it very much. Being (well) over 21, I had no urge to drink before I got home. No limo, but I let them “decorate” my car.
As I said, the bochurim don’t make the trip because of the money they get from me, their travel expenses are more than covered by the people on the other side of town 😉 But I appreciate their visit, and I think that makes them enjoy coming.