My brother has his own gaming PC a couple of metres away from mine, so we sit back-to-back and play together, coordinating our attacks and so on. For example, recently I was Recon (sniper) and he was Assault (medic). He spotted an enemy sniper and, on his count, he suppressed the enemy sniper from one angle while I took him down from another angle. I got the kill (obviously), but he was also awarded for "Suppression Assist". Sometimes we both go Assault (medic), and revive each other whenever we go down while pushing forward through the front-line.
Sounds just like us - we don't play online very often here. Instead, we play a lot of LAN games with bots to fill in our servers. Of course bots are rather stupid and eventually our games get dull when we discover their "thought patterns" but generally speaking we get a
lot more entertainment value out of these games than we do when we play online against people we don't know and don't even talk to.