A few pictures from last year (inside, it was with aircon.. almost to be expected in Singapore, I prefer the outdoor Beerfest they had other years at Clarke..
https://oktoberfestasia.com/
Still only from 2019.. but I guess, if there's a 2020 edition, it will use the same URL
They do promote a "Beer Fest Asia 2020" though, from 25th to 28th June.
https://www.hapz.com/festivals