Received from: The Specialist [New Ashos] (M23:14)
During [Sammy the Bull], inside Sammy's house you will meet the Specialists, who came there first and killed the man. A short while after two thugs will appear - you shouldn't have any problems with eliminating them, the man will help you in the fight. Talk with the Specialist - he will open a Secret passage through the cellar - follow him to get out. You will come across many thugs on your way - you can just quickly run past them, or eliminate one by one.
Once you're outside, return to Lexington (M23:13). Right in front of the "Lion" entrance you will meet George - you can complete a quest for him. Lawrence will give you the Membership Card and a small bonus. You will also unlock new quests, which will be available later (a proper information will appear onscreen).
You will unlock [A Card-Carrying Member].
You will unlock [George's Problem].
You will unlock [Mr. Lexington].
A Card-Carrying Member
Received from: Lexington [New Ashos] (M23:13)
Once you get the membership card from Lexington after completing [Sammy the Bull], approach the room chief. Show him the card - just read it - and the door will open. You shouldn't have problems with locating professor Kaineth - he's sitting opposite to the entrance, by a dice table. The man will offer you to see what you want. You will be sent to the Seers, located in the Scavengers camp [The Swallows] (M26:1). You will also learn the password.
You will unlock [Video Ergo Sum].