I see (Gary/Diki/Everyone) there really IS a cross section of people WHEREVER you go (including the Caregivers/Staff at Nursing Homes) - so, not so different I guess.
To be more helpful to Scott:
BROWN EYED GIRL (works everywhere)
I GOTTA FEELING (Black Eyed Peas) like it or not, it's a Feelgood, yet "Hip" song that - mostly - everyone of all ages likes.
LOVE IS IN THE AIR (An international Hit I believe, that is both a Samba and another Feel-good-everyone-likes-it number.
DANCING QUEEN/MAMA MIA (Surely Abba is relatively popular in the US? It simply does NOT fail in Australia. ANYWHERE)
MICHAEL JACKSON, especially *ahem* now...
(Blame it on the Boogie, The Way You Make Me Feel are two must plays we've found, & Billie Jean is a great Cha Cha)
ALL SHOOK UP - 'nuff said.
ROCKIN' ROBIN - Ditto.
COPACABANA - great, fun, Kitsch!
All the others mentioned above me....
P.S. Ooooh! GREAT BALLS OF FIRE - you get to show off your soloing skills AND it's a barnstormer of a RnR song everyone of all ages digs.