Where to go in midtown?

Going to be in NYC for a few days next week. Staying at the Waldorf Astoria in midtown. I know LA, Chicago, Miami, and most other big cities pretty well, but don't know the lowdown when it comes to NYC. Looking for bars and lounges, not really into night clubs. I'm in my early 20's and looking for places that tend to have good ratios and attractive women. I'll be there in the middle of the week, not on the weekend.