Take the door into the Hotel Lobby and quickly make it onto one of the statues under the ceiling, using the hook, because this are is being guarded by the Joker's men. Just like in the case of the several such locations earlier, it is a good idea to quickly locate and eliminate the enemy with the disrupting device (the antenna on his back), to ensure yourself with safety while tracking the rest of the enemies.
For the first time throughout the main campaign, you will have to deal with the enemies equipped with heat detectors. They will be busy with scanning vantage points and you need to avoid being detected in this way in order not to raise the alarm, by escaping onto another statue early enough. The exception is the situation in which you have bought an upgrade to Batman's suit that conceals his heat signature, although you need to watch out even then and stay motionless.
You can eliminate the Joker's people around in a variety of ways. Just like always, remember not to take excessive risk and do not let anybody spot you. I recommend that you use venting shafts, gliding and the inverted takedowns, as well as the grapple to pull the fire extinguishers and propane tanks towards the enemies. Continue eliminating the enemies, one after another, until you secure this area completely.
Jump down to a lower level and go West to reach the door to the security room. Since the door is locked, you need to select the Cryptographic Sequencer from the inventory and solve the already learned hacking mini-game (the screenshot). Watch a longer cutscene here, after which Batman will automatically acquire the Electrocutioner's Shock Gloves.
[New challenge: Campaign Challenge)]
[New challenge: Custom Challenge]
[New challenge: Combat Training]
[Character Profile Updated: Electrocutioner]