This tends to prove that the location-based services-oriented "social" remain largely the work of a coterie of geeks and early adopters who select the community with which they share (4S as it is called, is indeed closely linked to the "statusphère" and therefore very close encountered uses Twitter for example).
Fourquare announced in the same blog post that they moved to San Francisco and Silicon Valley. Valley or another giant size means cutting their cruppers side of check-in and loyalty coupons offered by retailers reported their loyal visitors.
