Raylan seriously considered not coming, but drinking with people was probably healthier than drinking alone, and those were the two likely choices for the evening.

He's easy to spot, even once he takes his hat off; he looks out of place, though not necessarily uncomfortable. He did, at least, bother to conceal his weapon.

He spots Rachel and gives her a nod when she makes eye contact. He doesn't want to presume she's not there with more social friends, but she's probably the closest thing he has to a friend here, now that Tim's gone.