Euchronia has no formal or strict dress code. However, many patrons will be "dressed up", and a large proportion will be wearing period or steamy garb.
If that sounds worthwhile, here are some clothing-related links to assist and inspire you:
And if your aim is to look steampunk, here are some amusing examples of what not to wear:
If you're in the market for some sartorial steaminess, you might try these Neo-Victorian and Steampunk Couturiers.
Finally, if you'd like to hire an outfit or part of one, here are a couple of Melbourne Costumers who should be able to help:
Rose Chong Costumes
218 Gertrude Street
Fitzroy VIC 3065
Ph: (03) 9419-6233
1st Floor, 43 Hardware Lane
Melbourne VIC 3000
PH: (03) 9670 1765
Also in Kensington, Croydon, Dandenong, Nunawading