Playing freerolls On-line, I have won $40 to $50 on occasions, But in a Live Freeroll in a Casino I won £200 finishing in 2nd place, and Yes you can find them, Redtooth Poker Leagues here in the UK. Play weekly League games in Pubs all around the Country, finishing with the top 3 0r 4 players Qualifying every 3 Months to play a freeroll Tournament in a Casino, Top prize being a trip to Vegas playing in a Freeroll there with Thousands of Pounds in prize money, They call it the Vegas 100 because that is how many players are flown out there for this event every year.
If you live in the UK. It's worth checking out where the nearest Pub is that play weekly League games.