BAR, PUB, CLUB, and LOUNGE are all different types of names for bars or nightlife venues, but there are some differences between them.

1. BAR: Usually refers to a separate bar counter or a bar room. In a BAR, there are usually only drinks and some simple snacks, and the music is usually quiet or no music.

2. PUB: It is a traditional British pub, usually associated with a brewery, and specializes in beer from a certain brewery. PUB usually has some simple food and drinks, and the music is usually soft.

3. CLUB: Usually refers to a nightlife venue, focusing on dancing and music. There are many booths and dance floors in the CLUB, where people can drink and dance, and they are usually younger.

4. LOUNGE: Usually refers to a relatively high-end bar or nightlife venue, providing a variety of high-end drinks, music and atmosphere. The decoration and atmosphere of LOUNGE are usually relatively luxurious, and people can enjoy a relatively high-quality nightlife experience here.

In short, these bar types have their own unique characteristics and services. People can choose the bar type that suits them according to their preferences and needs.