Something flirty.

You rack your brain to think of something convincing to say, and after a few seconds, you come up with something. You lean closer to Grillby and say that you would be very grateful if Grillby would give you a bit of an increase to your salary before you start working here. You say that you would be sure to personally~ repay the favor to Grillby sometime, openly letting your gaze roam over Grillby's athletic physique. Though it's very hard to tell, you think you see Grillby's cheeks redden ever so slightly, and feel the temperature of the air increase. You wait a bit for Grillby to do something, but nothing happens. With nothing else to do, you sign the application without further complaint, handing both it, and the pen, back to Grillby. After giving the job application a quick once over, Grillby nods his head and offers to shake your hand. Despite your hesitance at shaking hands with someone who appears to be made of fire, you do it anyway. Grillby's hand feels somewhat warmer than what you expect a human's hand to feel like. It's also more solid than you were expecting, which confirms that those muscles you saw earlier aren't just for show.

After finishing your handshake, Grillby takes his rag and goes back to wiping down the counter. You don't think you're being dismissed, though it's hard to tell. You suppose you could tell Grillby you would like to start working right away, but you could also talk to one of the other patrons here, or even Grillby, in order to pass the time until it gets busier. You could even leave the pub and come back to work another time if you wanted to.