Bernie ... for those 1 - 1 1/2 hour Senior or NH gigs I've created different playlists or 'programs' ... one might feature BB songs from the 40's, another songs from the 50's, another C/W songs ... I will also try to set up a playlist based on the time of year, like for the summer I played some Beach Boys, some 'island' songs, ... another could be songs from the movies etc. ...
Don't know if this helps ...