Do they have the same meaning?

[dilodi83]

Do they have the same meaning? And, can I use in the same context?

1) What about having a bath together?
2) How about having a bath together?
3) What do you think about having a bath together?
4) How do you like having a bath together?

1) What do you think about that movie?
2) How do you like that movie?
3) What about that movie?
4) How about that movie?

[5jj]

1) What about having a bath together?
2) How about having a bath together?
3) What do you think about having a bath together?
4) How do you like having a bath together?

#1 -3 could have the same meaning - a suggestion.
#3 could also be asking for the other person's opinion of this activity in general.
#4 is more likely to be said during or after the bath, asking how the other person felt about the experience.

5

[Rover_KE]

Note that What about having a bath together? would have been a much more engaging title for your thread.

Rover

[5jj]

Note that What about having a bath together? would have been a much more engaging title for your thread.

Though I might have thought it was an invitation, and then been sadly disappointed.