Roberto would be the first to say he wasn't much of a gambler. He'd also be lying when he said it.
Honestly, he gambled all the damn time: on Vash in the duel he'd shoved the guy into, on Wolfwood when he didn't object more strongly to him joining them, on Meryl when he let her lead them right back to the boys and again when he'd passed the torch to her in the end. Roberto gambled on people all the time.
What he didn't tend to do, despite being very, very good at reading other people, was gamble for money. Sure, he could win a few card games, call some bluffs, nudge people into betting too much too fast, and falling hard when they lost. That was easy.
He just didn't like to deal with the aftermath of having to gamble on who would come after the old man who was a little too good at winning or keep track of the people watching the game and waiting for the winner to walk away, flush with double dollars and ripe for the picking.
Arcanus was a gentler place, but his habits hadn't relaxed quite that much.
That didn't mean he wasn't willing to watch the card game from the sidelines, keeping quiet track of winning hands and losing ones and the people who were probably cheating, counting cards, or just unnaturally good at the game. And the echo he knew for a fact he hadn't met and wasn't on the little list in the notebook he kept in his pocket. He'd begun keeping track of the other echoes and noting the major players among them after Sonare. With a criminal organization out there and a place that could prey so strongly on your weaknesses, it would be good to know who would be the best to run into and the ones he should avoid.
This one he hadn't gotten a read on yet, but there was something hiding in his strange eyes and under all those gaudy and expensive looking clothes. The only people who dressed like that wanted to be seen and weren't afraid of the consequences. Stupid or powerful, it was a toss-up.
Roberto was leaning toward the later, though, of course, the fellow would find himself pretty powerless here.
Quietly, Roberto signaled the bartender and put a drink on his tab, having it delivered to the fellow at the card table while he remained watching from the bar and fading into the background.