Yes. I' e been thinking of doing this lately but only to add pressure. Be careful though you are walking a fine line here. You have to play for enough that if you lose it hurts you if you want to truly get the most out of it. If you play for 5 or 20 bucks, sure you want to win, but there's no real added pressure.
Further more if your playing for a lot of money, close line cAlls are going to start getting interesting. Just be careful you don't lose friends doing this. It hard enough to lose for pride games let alone 100 bux on top of that lol.