I saw different coloured tables in party poker lobby. I did read their FAQ but could not find what I needed. They wrote that different colours mean e.g. jackpot tables, or real money tables (??? I thought that all the tables are real money tables)

What is a jackpot table? How the jackpot can be won? (these are normally red tables)
What is a "speed" table (in blue)?
What is a "no DP" table?

Also please someone can explain what is a real-money table? I thought we all play in real money there.