Want deeply discounted services at top salons? Go here.

It’s a brilliant idea, really–work with top salons who, like the rest of us, are hurting a bit in the current economy, and find a way to get them booked up during dead hours if they offer the services at a discount.

I give you Lifebooker.com. It’s a relatively new site, and for now covers salons in the New York and Los Angeles areas only, but they expect to expand nationwide very soon.

Here’s how it works–you search for salon and spa services online, and you’re given available time, the amount of the discount–as much as 50% in most cases, with occasional specials for even bigger discounts–and book your service for the available time, much the way opentable.com works for restaurant reservations.

Lifebooker began its online service about a year and a half ago for salons and spas in New York City, and just added Los Angeles a couple of months ago. You can search by service, price, neighborhood, salon name or appointment time. And if you go back and add a review after your service, you’ll earn “Reward Dollars,” cash-back credits that you can use on future appointments. They offer everything from standard salon services (for women and men) to waxing to tanning to full-blow spa packages.

If those highlights are looking a little faded or your layers have disappeared, if your eyebrows make you look like Groucho Marx or you just want a massage, you’ll find great deals on Lifebooker. For those of you in other cities, keep an eye out for their entry into your market, and I’ll update here whenever I see new cities added to the menu.