Back when Empire Service terminated at NYG until 1991, there were shuttles NYP <-> NYG. This summer passengers must make their own connections. There are two routes by subway : 1/2/3 north to Times Square and shuttle or 7 east to Grand Central. Which is favored: shuttle or 7? The shuttle directly leads into the west concourse of GCT, but the 7 is deeper and requires two levels of escalators. At Times Square, the 7 is directly below the IRT 1/2/3 lines, shuttle further away on the concourse. (For those with extra time and no loads to carry and wanting a one-seat transfer, there's the Q32 bus from Penn Station to Grand Central stopping on Madison a block away).
Since my friend continues to chain smoke nonstop, she is probably an Alco.