I'd say, be confident, be casual. Don't word things like an English major. Just say, "Mind if I put my arm on your shoulder?" Or if you feel like not touching them, just give a thumbs-up, or put your hands on your side, or cross your arms...
Limp noodle arms are the bane of picture-taking. xD
facebook page // nh cosplay events
COSPLAYS IN PROGRESS
Constructing : Soren (Fire Emblem), Fox (RWBY)
Upgrading : Sheik (armor), Cloud (wig and armor)