Maccadam's Old Oil House

"...to be loved by you."

For those in the know, sub-level six on Cybertron's lower-east quadrant is better known as Maccadam's Old Oil House--the biggest single source of black market fuel on Cybertron. Its main attraction, beyond the fuel itself, is that the proprietors make no distinction between Autobots, Neutralists and Decepticons. If you can pay, you can stay.

And they have a harpsichord that turns into a robot. You don't get much cooler than that.

Fiction

Marvel Comics continuity

(Note: Events from the UK comic are in italics.)

Feeling like losers, Dreadwind and Darkwing chose to drink away their sorrows at Maccadam's Old Oil House. The Mecannibals followed them to the pub, eating their way past Rocky, the bouncer. The Mecannibals immediately began tearing up the joint, with the pair of innebriated Decepticons blissfully unaware of the chaos around them. Luckily, Quickswitch was present and leapt into action. After a brief skirmish, Quickswitch used his tunneling mode to bury the Mecannibals alive deep underground.

Fun Publications Cybertron comics

Crush Groove and Jackhammer successfully pulled the heist of the century, breaking into Maccadam's Old Oil House and stealing all the Energon and oil they'd ever need.

Or at least, it would have been the heist of the century, if they hadn't waited for everyone to evacuate due to the Unicron Singularity. Even then it would have still been good for bragging rights if they hadn't immediately been killed by Ramjet and Nemesis Prime.

Crime just doesn't pay.

From Teletraan I: The Transformers Wiki, a Wikia wiki.