I check it quite often because I'm not keen on the way that Instagram doesn't show pictures in time order anymore and I'm just quite nosey lol. I also check Snapchat maps pretty often I guess? If I'm waiting for a reply or something I'll just see where people are, especially on school holidays to see if anyone's on holiday.
edit: On reading this for the second time I've come to the conclusion I'm really nosey oh my god