Having done most of my flying in the USA (Florida) I found I could be an "airport bum" for most of the day on any given day chatting and passing the time of day with many pilots if I had had the time, In fact many a day my wife had to call me up to remind me I had a home to go too ...lol. Granted many there were retired and passed the time tinkering in their hangers, or going and blowing some holes in the sky for an hour or so.
Since I now spend most of my time in the UK I joined a flying club at my local airport, but unless there is something planned going on I rarely see any one hanging around socalising, it's usually just the odd instructor and any students who happen to be in for a lesson.