Hi, generally ugc looking threads are posted on the ugc forums. You can find the 4s LFT forum on UGC's website here: http://www.ugcleague.net/forum/forumdisplay.php?134-Players-Looking-for-Teams

And here's where you can find threads posted by team leaders, looking for players:
http://www.ugcleague.net/forum/forumdisplay.php?138-Teams-Looking-for-Players

I recommend adding team leaders and asking to try out, it's a reliable way to get tryouts for teams that fit what you're looking for in terms of attitude and schedule.

This forum isn't a good place to find 4s teams, as it's mostly focused on ESEA and 6s.

Good luck in your search for a team!