Sex friends with benefits

I have an unspoken arrangement with a bar staff. She calls me up, arranges to take me to dinner, we enjoy chatting over dinner, I get drunk and have sex with her. She pays for the outing.
This arrangement is basically sex friends, but because I get free food and beer, it's sex friends with benefits. The girl is good looking, but here is the impossible problem with this seemingly ideal situation; she sux in bed.

It honestly feels like work for me because I'm not incredibly keen on her and on top of that I don't think she enjoys sex much and thus I can't enjoy it. Seriously, I can't cum. If girls don't cum, I have a problem with cumming myself. I could make her cum but that would take a lot of doing and I would need to spend too much effort, more than I'm willing to invest, on a girl I'm not incredibly passionate about. I really think this girl has a heart of gold and is pretty easy to talk to and our relationship would be great if it weren't for the sexual performance aspect.

In general, I would say that foreign girls are much better in bed than Japanese girls. This is a generalization however, but generalizations are generally accurate. I'm really lacking in good sex these days and I need more, so I'm beginning to wonder if Japanese hookers have skill. But I'm not so sure because even Japanese pornstars suck in bed. I often see porn with a Japanese girl just lying there passively with her eyes closed while a ton of guys take vibrators to her.

Some things that make this girl suck in bed.

She was wearing a sexy cap when we met- LEAVE THAT SHIT ON! It's doing you favors! Don't just take it off and expose your messy ass hair. Same with the shoes and jewelry.
Further more, I have a penis. RECOGNIZE IT! Don't just be pretending it ain't there and when I take your hand and guide you to let you know where it is, don't just rub the tip softly with your thumb and forefinger forever. Realize that I have a whole penile shaft and you have a whole hand and fingers ain't gonna cover it. Especially at that light pressure. If you don't like using your hand, even better, use your mouth!
If you aren't into it, let me know what does you right and I'll do it. If you are indeed actually into it, don't keep it a secret. Show some passion. Show the fact that you are excited or just turned on by me. You can do that by looking at me instead of closing your eyes and turning away. What? You are shy? This is no time to be shy, my dick is right inside you. You can give some audible response to what I'm doing. When I talk to you while we are fucking you can respond. When I say shit like, "Like this?" You can respond with, "Yes! Like that... Do me more!"
Don't be weirded out by sex positions that aren't missionary and try to change back as soon as you can. Try using your hips when we are rocking it instead of just not moving and lying there passively.