You don't need to beat every friend at every game on the activities.
I just finished the last mission. I'd done everything optional first (this is how I play GTA games) and saved the missions for later.
I'm currently at the 96.67% mark that everyone without the seagulls is at. I did that by winning only a single pool game against the Lost clubhouse AI.
Granted, I played the other characters at pool but I'm terrible at pool and in both GTAIV and GTAIV:TLaD I've only managed to win a pool game by playing long enough for the AI to pocket the 8 ball. On the friend activities I pretty much half-assed it and just waited for them to beat me. I still got the percentage.
I actually did win a game fair-and-square last night but I ended up reverting to a prior save due to a panic over the hi-low game. In case you're wondering: the clubhouse games are briefly unavailable after Billy is arrested and I panicked. It had taken me like an hour to win a pool game but I still reverted to a save that would allow me to do the hi-low. It was on my later try that I had to settle for a scratch/foul win.
In any case, I have multiple wins on air hockey and darts (they're easy) but I know I only have 1 pool win (again, against the clubhouse AI, not one of the specific gang members during activities) and I think I may only have 1 armwrestling win, against the generic AI as well.
But yeah, believe me: if you had to win 2 or 3 pool games to get to 100% I'd be contemplating suicide right now. I just suck at it.
Edited by GuruAskew, 20 February 2009 - 05:28 AM.