http://www.checkinmania.com/deals
Plug in your location and it will show you businesses that have Foursquare deals set up.
Some notable ones from the Melbourne CBD:
Grill'd Melbourne Central, for every 3rd check in you will receive a free mini chips with your burger purchase. Remember, our reigning Mayor gets 1 free burger per day.
Oporto Free upsize chips & drink with any single or double fillet meal deal purchase for every 5th checkin.
Red Spice Road You're officially a regular…. Have a drink up to $10 on us! (Show to your barman)
And so on. Pretty easy way to score a discount.
On a sidenote, I used Facebook checkin at a pub the other day. It showed me a few people who were checked in. I clicked on one of the profiles and it revealed a woman's picture, hobbies, favourite movies and relationship status: single. Moral of the story is not only can you save money using checkin but you can potentially be more well prepared to woo a woman/man.
deals look really cool! but some questions:
how do you use this? is there an app to download? is there one for android?
how does it keep track of where you've been and how often?