I have always provided bowl baths to my birds. I use it as a bonding playtime. I would take my CAG into the shower as he didn't care for the bowl and was a bird who would enjoy the shower AFTER HE WAS THERE.
Caiques love to play sooo much

that they really seem to enjoy the table time.
The only real key is to find a stable bowl that is food safe (not painted with lead based paints) and is a good size. Earlier I posted on Louie's bath with pictures...the bowl I use is fairly large across yet not very high. I fill it to almost the brim, and add toys to tempt the curious

and with an uplifted voice we just play for a good bit of time...enough for Louie to learn that the bath is a fun thing
For Louie the first session won him over. I used the same bowl, but a smaller size, and he was drenched beak to tail by the time we wrapped up. For the second bath I changed to the super-sized bowl so he had more room to romp in the water...I believe caiques are naturals for bathing...whether under a kitchen faucet, in a sink, in the shower, or in a bowl they all seem to find a way to enjoy themselves.
Personally I prefer the table because Louie is a

daredevil and will flip and swirl at a moment's notice. I am leary that he would slip on his grip and possibly hit a hard shower floor since he's still so young. Plus on the table I get to take pictures and play with him.
One of the best things is after bathtime I get to sit in my rocker with Louie snuggled under a mini towel, and he gets cuddle-dried.
Yeah, I'm one of the ones who just loves the smell of caique feathers

AHHHHHH. Then after the bath Louie gets the great softy feathers and I think he reacts

with the satisfied ONE EYE dazed/contented look much more during the next few days while his feathers are soo soft.
I have set aside weekends as our bath-playtime, but now that my husband will be returning to the nest we will be making another plan - right now I will be planning on a weekly bath, but as long as it is before 1PM and the time is right---Louie is in the mood

, any day it good. Personally I do believe you should provide a bathing experience at least weekly with special times added for molting.
Anyway, hope this helps and you give tabletop bathtimes a try.