"We are trying to make Hamilton the gay capital of New Zealand, but there's a long way to go!
"Our festival last year coincided with the Rugby World Cup and we weren't allowed to hang our rainbow knitting on Victoria Bridge, although we ended up getting permission to hang it on the Riff Raff statue."
In her lecture Professor Johnston will draw on the experiences of cities as different as Hamilton, Sydney and Edinburgh in coming to terms with the public expression and celebration of sexual diversity, and she warns that the audience can expect a few surprises.
"It's the end of the year, and a topic like mine can upset people who are still very connected to conservative ideas. So often I use humour to break down barriers."
She's also encouraging the audience to "dress fabulously" for the occasion.
Professor Johnston's inaugural professorial lecture, "Proud people and places or just more Riff Raff? The spatial politics of Gay Pride", is on Tuesday, November 20 at the Gallagher Academy of Performing Arts at the University of Waikato.
The Opus Bar is open from 5pm and the lecture begins at 6pm.