Buying someone a beer no longer requires you to be in the same pub or bar.
Tenfour have created Tweet-a-Beer to let you buy someone a beer long distance.
Tweet-A-Beer uses Chirpify — an e-commerce platform that lets you buy, sell and donate money — to sync your Twitter account to your PayPal account. You can send your friends $5 beer money.
It does now mean that it can still be your round even if you're not there.