Pretty much any Nightcliff local can give you the low-down on Groove. I've lived in Nightcliff for about 4 years now so eaten here many a time. Its true the menu is veg-friendly; not mega vegan-friendly but its easy to modify a lot of it. Coffee is pretty good for Darwin. The best thing is although the service is often at a snail-pace, it's friendly and easy-going so you don't mind. Great location and chilled out vibe.
If I had to search for criticism it would be that for the price of the meals, I'd expect a slightly classier experience (eg home-made baked beans instead of from the tin, or some nice sourdough toast rather than supermarket bread). That's just me being picky though. The food is nevertheless pretty reliable and they don't mind my dog sitting under the table so Groove gets in my good books. But given the choice, I'd probably stick with Martins down in Coconut Grove.Pros: great location, chilled vibe, decent coffee
Cons: slow service (sometimes)