The paino bench for rows should be fine. It might be a little high - I'm trying to recall the height of my mom's baby grand's seat. It's certainly close enough.
Do you have enough room to safetly use the EZ curl bar? I actually have done Bent-Over Rows with an EZ curl bar because it let my hands sit in a more natural position for me. For now, I'll assume dumbells are the only answer.
As for the routine, I'd be happy to. TimD put together a great basis for a routine. Rather than re-invent the wheel we can just flesh out his excellent suggestion. I've linked to the exercise and written a few notes.
First:
Reps & Sets: I generally set you at 10 reps for a warmup, and then 1 set of 10 reps for the workout. If you can do the reps with good form for 10 reps, next week raise the weight by a little bit. Another option is 1 warmup set and then 3 sets of 8-12 reps. Start at 3 sets of 8, add reps each workout until you do 3 x 12, then up the weight and drop back down to 3 x 8 and progress up. There are really many rep/set options, but I found these seem to work well. Again this is YOUR body and YOUR workout, so you need to feel out what's working better for you! Read the articles here and make an informed decision. I won't be insulted in the least if you modify this. Your workout is about you, not about anyone else.
Warmup: I generally warmup at 50% of my work weight. So if you can only do 10kg, warm up at 5kg. If you can do 45kg, warm up at 22.5kg or as close to that as you can get.
Technique: Form is critical. Watch the animated gifs of the exercises, read the descriptions of the techniques, and ask here if you still aren't sure. Doing weight training with bad form is at best useless, and can be dangerous. Getting up extra weight doesn't help if you aren't using the right technique. I tell my friends when I help them train that weight training isn't using technique to lift a weight, but doing a specific technique with weights to add resistance. It's the movement, not the weight.
[1] Clean and Press - 1 x 10 warmup, 1 x 10 work set (or 3 x 8-12)
[2]
Dumbell Squat - 1 x 10 warmup, 1 x 10 work set (or 3 x 8-12).
[3]
Dumbell Bench Press. 1 x 10 warmup, 1 x 10 work set (or 3 x 8-12)
[4]
Dumbell Bent-Over Rows. 1 x 10 warmup, 1 x 10 work set (or 3 x 8-12)
[5]
Crunch - 1-2 sets of 25 reps.
And that's it. There are other auxiliary exercises you can do, but this is plenty. Do this 2-3 days a week. You can up weights every workout, or up them every week. Don't jump a lot in weight, a steady climb with good technique is better. You've got the rest of your life to improve, don't rush it, get hurt, and blow it!
Notes:
[1] A combination of a
Clean and a
Shoulder Press Actually, I'm curious why this isn't listed as a discrete exercise on exrx. If it is, I can't find it. Anyway, clean the weight but with dumbells, then execute a shoulder press. Return the weights to the floor, don't drop them in your rented room!
[2] Alternately, just do bodyweight squats. Start at 10 or so, try to add one per workout. You'll build muscle (you're squatting a lot of weight even without the dumbells) and lots of endurance as you build them up. You could alternate these between workouts - one with weights, the next time bodyweight-only squats. You could do bodyweight squats as 1 long set, or multiple sets (say 3) at a few reps less per set than your maximum.
[3] Do these on the piano bench if that's comfortable, otherwise use the floor with control and a pause as Hoosegow mentioned. Or do pushups. If those are too hard, you can progress slowly towards a pushup. There is an
excellent video about this on
crossfit.
[4] Use the piano bench.
[5] You don't have to weight them, but you can.
One final thing - if you possible can, get a chin-up/pullup bar. There are door mounted ones that should be able to take your weight. If you can't do a pullup, check out the advice on Simplefit to work up to doing on. These are fantastic upper body exercises...so much so that I generally tell people to do upper body work so they can get strong enough to do them, and then move on to centering on pullups or chinups. If you can do this, get the bar and stick the chinups or pullups in between 3 and 4 in the workout list above.
Feel free to ask questions. I hope this helps. And thanks to TimD for a great short routine I could expand on.[/url]