well apartment living can be exciting you can get to know your neighbours and organise games evenings or whatever on your floor..I mean you dont have to go far for company.
In recall various things they had in retirment villages that always had social things going on stuff like
craft clubs -kniting crochet, art, drawing, painting, mosaic
gardening groups (if no space, could do it on the roof? or sunny balcony?)
mens shed
puzzles
snooker (pool)
zumba or dance class
piano or choir
outings/trips ...everyone organise a van/bus and go somewhere for the day
prayer and bible study groups
learn something new...a language perhaps.
swap recipes
oldies were a social bunch. Many had lost a spouse so they band together and support each other.