Historical clue formulations

• Card game whose winning hands can be found hidden in 17-, 27-, 42- and 54-Across — 2024-06-25
• Game depicted in the circled squares — 2017-01-29
• Bad thing to bust in — 2012-08-10
• Number associated with 17-, 25-, 41- and 51-Across — 2011-05-31
• *Black — 2011-02-09
• Theme of this puzzle — 2003-10-08
• Gambling game — 1996-07-15