Dd1 got a bath in a kitchen sink every 2-3 days with the help of the little girl I was nannying at the time. It had entertainment value and was awesome I could take care of this babycare task at work.
Sometimes I showered with her. We both loved that! I didn't have a tub at home when she was little, or a babytub, or a sink big enough, so it was either a shower at home or a bath at work! When she got old enough to sit up on her own I started putting her in the big tub and it became part of her bedtime routine. She still liked to shower with me or her auntie sometimes though. During the summer then and still she bathes every day if at all possible, but washes her hair only every other day. During the winter only every 2-3 days. This is because of the dry skin factor. In fact that is why I tell the new mommas I work with to bath 2-3 times a week. It dries their skin out and they are not doing anything to get dirty, so as long as you are washing the diaper area, neck folds, behind ears, and rinsing the face and hands daily you're good to go. Of course, like anything else if it works for you to bathe daily, bathe away! I did recently read that babies bathed more than once a day on a regular basis are more prone to eczema.
Dd2 has a little babytub, but I'm not crazy about it. I liked using it on the kitchen counter when she was tiny because it saved my back, but she was so unsupported. Plus her little bum doesn't stay on the little bump that is supposed to keep them up high in the tub, so she winds up with it in the small of her back. Ouch! I tried putting one of those sponges in there and that helped, but made less room for her in there and it was still awkward. I tried putting her in the tub with her big sister, but that makes me nervous. I finally found that putting the sponge in the big tub works pretty well. It kind of floats and keeps her from flipping over and getting her face in the water. My favorite, though, is to shower her! She LOVES it! I put her in her tub wrapped in a towel and sitting on her diaper. Then I get in and wash myself. When I'm done I reach out and pick her up and kind of flip the diaper out. I hold her facing me and get her wet. Then I wash her hair and rinse her. I turn her around and hold on very tightly to one thigh and wash the rest of her and rinse her. As long as I don't use too much soap or soap too many parts at once she doesn't get too slippery. Maintaining a good grip on the little thigh is key!