On to part 2 next. I came in a little late, after the question of the title. So my suggestion was pre-read. I do like the start of this, and I know how you like pulling the rug out from under your readers, so trying to see the mobster side, and the title side, and the comments side from those I read. At this point I am guessing that he was not in the owner of The Cobalt Nightclub, and that that would be his first customer. Of course I am likely 100% wrong, like most of the time.

Story wise, I do like the start. We have a very good understanding right off the bat about Zack, confident, but not overly so, capable of taking care of himself, and able to read people like an encyclopedia, instead of just a dime store novel.

Mikhail; A boss. Someone who likes total control. Doesn't really care about anyone or thing other than money.

Just my first impressions of those two, although there is likely a lot more depth to Mikhail to dig out.