The cafe will focus on premium coffee sourced from cafe st Ali in Melbourne which is regarded as the best cafe in Australia.
Cafe is targeted at the wealthier, more elite crowd to suit it's location.
Ultimately, the logo has to be-
Sophisticated yet youthful, fun yet elegant, fresh and contemporary.
Most importantly, "5ht" has to be absolutely clear, whatever the design is.
* you don't necessarily need to integrate the chemical structure into the logo
* the words "cafe & bar" need not be incorporated INTO the logo, it can be placed elsewhere
* abstract/wild/fun design ideas are welcome
*a little background info on 5 HT - https://en.wikipedia.org/wiki/Serotonin
perhaps cafe / bar can be incorporated somewhere on the logo/card if you feel it is
necessary and if the logo is not telling enough