4 is a rather uncommon rating from me then why does Koolar get it? It's a mix of food and ambience.
I rarely have work around Kings Circle so my trips there are specifically food visits, and as is obvious given the area, South Indian food reigns supreme. Koolar is just a strange fit in the place. I've spent a few yrs at Ruia back in 11/12th so this area is pretty familiar to me and I've generally liked it for its wide roads, breezy environs and because it's generally clean. I like the circle layout as well.
Koolar is located bang on the Circle (or close to it) so you get a cockpit view of the circle from Koolar. It is amazingly open with multiple inlets into the place making it feel large, breezy and bright though never too warm. Basically, I love the ambience, especially on a slow afternoon post jumping two dosa places and coming here for 1-2 of my favorite things.
The kheema pao is good but kheema fry better. Try it. Compared to SoBo Irani place, the kheema is much less spicier and generally not as exaggerated in flavors and tones. It's one of my top 3 favorite kheemas.
The wrestler's omlette is pretty darned badass. You better be very hungry ordering this. A five egg omlette can be somewhat intimidating if you're on a multi-stop food walk. Do get it if you intend it to be a cure for your hangover. Get a pav, put a chunk of omlette and some kheema fry and make a omlette kheema pav (like one would a wada pav) and some mad flavors jump out at you.
One of the times, the old server got me some of the freshest pav I've ever eaten. With butter, I could have made a meal of just that.
Brun maska chai is good if you land up at that strange 4-5 pm slot.
All in all, not more than 200 bucks per head, and pretty much the only legit Irani joint north of Fort.
You hear stories of the owner with a MAD temper. Never seen that, but the old server there has a smile to compete with the Dalai Lama. Try it.