This is a matter of playing with the PS1 variable on each of the machines. Using your first example, you would add/modify the following to each machines ~/.bashrc file:
Code:
# user@host:pwd$
PS1="\u@\h:\W\$ "
Once done, you can activate it with either of the following commands:
Code:
source .bashrc
# or
. .bashrc
If you use the screen command alot, you might also enjoy \l, which displays your tty. For more info, do a search on bash prompt configuration.