the meaning of "waiter-stroke-artist
The context
A:I need to be in London,I need flexible hours...
B:Why, what's your stroke?
A:My what?
B:Your stroke.Everyone who works here has a stroke.Waiter-stroke-artist,waiter-stroke-actor......
Then what's the meaning of stroke? And I can't understand the meaning of "waiter-stroke-artist. Thank you for answering.