Modelmaking.
Some members use the Club evenings to carry on modelling activities that are not necessarily tied to any layout. Whitemetal and etched brass kits are built. Plastic kits are built and painted. Layouts are planned. For a while, the Chessie Team were testing software using a virtual layout (a fancy description of a drawing on wall paper with pieces of paper representing individual freight cars). Ready to run rolling stock is routinely detailed. Whisper it quietly, but the odd bus or two has been seen receiving attention! Meccano is also spotted from time to time.
In earlier times, radio controlled 1/8th scale tanks have been demonstrated, with much simulated cannon and machine-gun fire. (I didn't think the tea was that bad!).