There’s a LOT of car fun on the 360, I’ll take the Forza Motorsport series over PGR as it does the things I like better, but Rallysport Challenge is great too. Paradise City is more fun than any racer ought to have a right to be, for all the wrong reasons (Showtime! Hit Buses for bonus point multipliers! http://www.youtube.com/watch?v=g3ybat1DTJ4 )
Senor, there are forums and websites, start talking to folks, get in on community games, start adding people and Friends of Friends accounts, and there ya go.
How I got into it was when I started up a game lobby, I’d spam the list with invites until people got in. We’d fill a lobby, play, and do it again over and over and over again. Sometimes people will ask who you are because you’re new, so you just shoot them a message saying you’re part of whatever community and people will start filtering in.
Bwah ha! Adult Multiplayers: