Not on the poker tables where I play, I can see you point on more casino oriented games(roulette etc.) though and I wouldn't play those for that reason(along with the fact your odds of winning even it it were straight up aren't good).
On the Party Poker tables and similar sites you have to remember that all the ppl you are playing against are other humans, the house has nothing to gain by stacking the odds in any one players favour(unless that player worked for the company that provided the game but thats getting into the realms of JFK conspiricy theories :P). The way the tournaments I play in work is that its a 10 player game, each player pays in a fixed stake at the start of the game(and this varies on how high stakes you want to play for...ranges from $5 to $250 and possibly more). So take this stake and * 10, for a $5 game thats $50 and for a $250 its $2500. Each player then gets 800 chips, you play against each other and when you lose all your chips you are out. Payout is to the players who finish 1st, 2nd and 3rd, 3rd gets 20% of the pot, 2nd gets 30% and 1st gets 50%. So in a 5$ game with a total pot of $50, finish 3rd for $10, 2nd for $15 and 1st for $25....
The house gets its money from an additional payment you make for joining the table and this varies depending on the stakes of the table. So in the $5 game you also pay $1 to the house for a total of $6 down, so $6 from each player for $50 in the pot and $10 to the house. In the $250 tables its $25 payment to the house, so $275 from each player, $2500 in the pot and $250 to the house. I play this style of game because you know how much you can lose from the start, I can only lose my original stake and get to play many hands for that.
When you see how many of these tables are running at any given time and this is just the poker secion of Party Gaming you realise why when the company floated on the stockmarket the other week it was assigned a value greater than most high street shops.