Post-interview Event: to go or not?

Hi, I received an invitation from a FM I interviewed at inviting I guess interviewees back for another restaurant social/information session. I don't know if I should attend considering flight costs, or if events like these are common and are really meant for home-base med students. I didn't have many interviews and I would like to improve my chances, so I would go if it makes a difference for ranking at all but I am looking for any opinions out there. Thanks!
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums