from Roger G.:
When The Cure toured Australia in 1980, they were scheduled (and advertised) to play at Ainslie in ACT, but after the advertising ran, they were rescheduled to play Chequers in Sydney.
You have the poster for this filed under 1981. It should be in 1980 and replacing the Ainslie gig, listed under Wednesday 20 August. (20 August fell on a Wednesday in 1980).
Also, I went to this concert and it was brilliant!