These are all the chips I know of released to commemorate Hot August Nights. I include chips like Circus '92, which doesn't say "Hot August Nights" but was obviously released because of the event. False millennium purists may disagree <g>.

Atlantis Reno $5 Hot August Nights '97
Atlantis Reno $5 Hot August Nights '98
Atlantis Reno $5 Hot August Nights '99
Atlantis Reno $5 Hot August Nights 2000
Bally's Reno $5 Hot August Nights '91
Circus Circus Reno $5 Summer Nites '92
Circus Circus Reno $2.50 Hot August Nights '99
Circus Circus Reno $5 Hot August Nights '99
Harrah's Reno $5 Hot August Nights '93
Harrah's Reno $5 Hot August Nights '94
Harrah's Reno $5 Hot August Nights '95
Harrah's Reno $5 Hot August Nights '96
Harrah's Reno $5 Hot August Nights '97
Harrah's Reno $5 Hot August Nights '98
Harrah's Reno $5 Hot August Nights '99
Harrah's Reno $5 Hot August Nights 2000
Hilton Reno $5 Hot August Nights '98
Hilton Reno $25 Hot August Nights '98
Hilton Reno $5 Hot August Nights '99
Hilton Reno $25 Hot August Nights '99
Hilton Reno $5 Hot August Nights 2000
Hilton Reno $25 Hot August Nights 2000
Ore House August Hot Nights 2000 6-chip set
Peppermill Reno $5 Slot August Nights
Peppermill Reno $5 Peppermill In August '98
Peppermill Reno $5 Hot August Nights '99
Peppermill Reno $5 Summer of 2000
Silver Legacy $5 Hot August Nights '99
Silver Legacy $5 Hot August Nights 2000