From aforesaid book, on professional blackjack players:

The Life

6 An average day:
Waking at noon, the player breakfasts at his cheap hotel. He (profession 90% male) then
proceeds to the casino where he plays cards all day. Lunch and dinner are in the casino
restaurant. If there are other players in town, he may meet them after work to discuss
blackjack. If not, he plays and plays, until he no longer trusts his judgment. Returning to his
hotel, he soon falls asleep.
6.1 Dreams, in the main, center on blackjack.

7 Teams of players take all their meals together, and share rooms: saving on expenses is a
crucial part of pro play.
7.1 When the casino finally bars the team, they exhibit hysterical glee.
7.2 In a mood of careless jollity, they fly to a new exotic city, where the identical routine begins de novo
7.3 Casinos are open seven days a week.

8 It's a boring job with long hours.
8.1 Professional blackjack players curse and hate their profession.
8.2 "When are we going to be replaced with trained monkeys? Roll on the trained monkeys!"

9 Still, when pro gamblers leave the game, they will be found:
-- running racetrack betting schemes with computerized predictions
-- playing video poker machines, to an exact system
-- suing casinos which have illegally barred them