Goal - Get the band playing again..
Head into the oil bar and sit on the stool, the other robot patron will invite you to play his game. This can be quite tough, but basically, you need to get 5 in a row. When you get five in a row he will throw the bolts on the floor in disgust and you can pick them up.
Take the paper hanging from the shelf, this makes great fly paper, so head outside and use it with the water storage. Take it back in the bar and tap the bartender, the flies will escape and distract him while you make off with the oil can by the door. The robot will give the can to the drummer. Now give the bolts to the saxophonist, you will end up with two smashed plant pots and a plant. Which you can pick up.
Head up the stairs at the back, then up some more stairs to the square. Speak to the robot in the wheel chair and he will give you his oil can. Head back down both sets of stairs and then out the door by the band, you'll be back where you started earlier on - trying to cross the bridge.. Use the oil can with the oil drip and take this back to the robot in the wheelchair, he'll use the oil and request sunflower oil now!
Pick up the crank from the bottom of the wall and speak with the lady sitting on the bench. She wants you to make it 'infinity'. Look at the paper above the crank hole and you will see some symbols, match two of these on the clock by putting the crank in the hole and turning. When you make 'infinity' the lady will disappear inside. This will reveal a new set of symbols to change the clock to. Use the crank again to change the symbols and this time the man in the room, top right will leave. Go up the stairs to the room where he was and take the speaker. Come back down...