You can find out if a particular player is playing on the
site by using the "Find Player/Friends" feature.
To access the Find Player feature:
Go to the Game Lobby
From the menus at the top left, select "Options" and then click on "Find
Player/Friends"
The Find Player dialogue box will open
You can search for other
players by typing their name into the select box and clicking the "Find Player"
button. If that person is on the CardRoom.com site, the search will tell you
which table(s) the player is at (the player may be just an observer at that
table instead of being seated). If that player is online, you have the option
adding the player to your Friends List. You can also add players to your Friends
List by right clicking on their portrait while at a game table and selecting the
"Friend" option.
Note that the Friends List is saved on your local drive and
is only accessible from that particular machine.