Vegas wedding chapels?

I am getting married over labor day weekend... we are not looking for anything fancy or spectacular... just kind of want to get in get out go party... but i have a lot of family and friends coming and it seems standard for chapels to charge per guests that come... id say i have close to probably 50 coming... but don't want to fork out the extra cash for extra seats and certainly not going to charge people to see me get married... anyone have any ideas, or know of any chapels that don't cost a fortune to have more guests than normal.