The trick is not to be first, or you might end up having to buy a round. Stingy late middle-aged single model railway club members who have still to fly the nest will know this clever ploy.
They’ll also know the the trick of “I need to get back to mother and give her lunch, she’s stuck in the cellar and has difficulty climbing the staircase” conveniently just before it’s their round. BTW, they often have bigger locomotive collections than other club members.