Bubble bar

Bubble bars are similar to oxygen bars or waterpipes in real life. They provide a lot of fun for up to four Sims at once.

The Sims: Livin' Large
Bubble bars appear in The Sims: Livin' Large. They cause Sims to giggle and satisfy Fun need.

The Sims 2: University
Bubble bars appear in The Sims 2: University. They cause Sims to giggle and levitate. They satisfy the Fun need.

The Sims 3: Late Night
Bubble bars in The Sims 3: Late Night have six different flavors. Though each flavor costs the same in every venue - §15 - each affect Sims differently. In order to get the effect of the flavor, Sims must spend a couple hours blowing bubbles uninterrupted. Be sure not to let a Sim pay for using the bubble bar too close to closing time or they'll have to leave before the effect sinks in.
 * Banana: Gives the 'Banan-ahhhhhhhhh' moodlet for 2 hours, providing +15 mood.
 * Chocolate: Gives the 'Chocolate Chuckles' moodlet for 2 hours, providing +15 mood. May also increase a Sim's success with telling jokes.
 * Cotton Candy: Gives the 'Sugar Rush' moodlet for 4 hours, providing +15 mood and allowing them to ignore a low Energy motive.
 * Mint: Gives the 'Minty Breath' moodlet for 2 hours, providing +5 mood.
 * Pineapple: Gives the 'On a Beach' moodlet for 2 hours, providing +15 mood.
 * Strawberry: Gives the 'Social Strawberry' moodlet for 2 hours, providing +15 mood. May also provide some bonus for building relationships.

Trivia

 * The bubble bar can produce shapes if the player practices with it for a little while. The possible shapes are a llama, a plumb-bob, a star, a heart, and a regular. A Sim playing with bubbles gains the secret Bubble blowing skill.