Using the discount dining app EatClub, you can browse for "live" deals or daily deals at various participating restaurants. These typically range from 20% to 50% off dine in or takeaway. There are some genuinely good restaurants available on this app, all of the ones listed in my area I like going to anyway. Plus, the discount appears to include all drinks as well.
Using the promo code "LAUNCH" when redeeming the discount, you can increase the discount by 20 percentage points. So if the original discount is 20%, it will increase to 40% etc. Giving a maximum discount on your meal of 70%.
I cannot confirm if this works in Melbourne or Sydney, but it appears that it does. Please report if you try using it and it won't work.
Also unsure if it's one use per account or multiple use.
If you haven't signed up to EatClub before, you can use a referral code after creating an account which will give you a free meal voucher that has 7 days expiry.
Thanks OP when's the expiry on the code?