I've done, on video, 150-pound dumbbells in each hand -I think it was, like, twenty two reps - on an incline.
If you've noticed that dumbbells work better than barbells for you on the bench press, then why change that?
I was more of a weightlifter.
I keep dumbbells in my trailer, and I work out between takes.
Most of the hotel gym's are not adequate. I mean you might be able to train your arms, but you aren't going to be able to train legs, back, or even chest if they don't have dumbbells and benches.
I lift weights. Then I put them down again.
I keep 10-pound dumbbells in my dressing room. It's nice to do before a show to get your muscles to wake up.
I've never done any arm-strengthening drills.
If you don't own traditional dumbbells, you can also use soup cans or bottles of water.