I'm not so sure about all this. What was the "Don't contact me directly ever again" from Geary remark all about? I don't think any money exchanged hands before the meeting.
Tom probably contacted Turnbull directly and invited him to the party. Of course, Geary knew who Tom represented. Mike wanted favors and influence such as only Geary could provide. That's why he made the donation to the Univeraity. But, Geary then finds out about moving Klingman out, knows about the license procedures, and does intend to squeeze Michael in exchange for his help on the license. Maybe Turnbull had been bribed already by Tom to facilitate access to Geary. That wouldn't be unusual. Afterall, the license probably would not be the only thing Mike would want help on during Geary's term in office. Mike would have to keep bribing Turnbull everytime Mike needed the Senator's help - kind of like a broker's fee.
I see Mike's "Turnbull is a good man" comment as kind of a distraction type of statement, one that he made in order to avoid a direct reaction to Geary's statement about the Tropigala. Or it cold have been sort of a reminder to Geary that they were already doing business with Turnbull.