ID: Ask about tonight's patrons.

"Hi, do you have a moment?" The bartender seems to perk up at that, putting away the rag he was wiping the bar down with. "Well, as you can see, I have a lot of folks to attend to, so make it quick!" He laughs, listening attentively. "What kind of patrons have you seen tonight? Any, well, shady guests?" He thinks for a moment, nodding. "Ya know, there was that one group. Regulars, come in every few days. Always very polite, don't get me wrong, but they're just a little loud." He shrugs before he continues. "Then again, it's been quiet all night, so I didn't mind the noise." Regulars - by your best guess, that's the Twilight Gang. "Was the group made up of four guys, all in suits or nice clothes?" The bartender nods.