Practicing phrasal verbs - Are these sentences correct ? Thank you!

Hello everybody. I am using phrasal verbs from different countries but I also would like to know how you say the same thing in your country with your own phrasal verbs.

1. chat up

2. creep round

3. fit in

4. join in

5. lounge around

1. My friend was trying to chat up a waitress in the bar.
Good.  In American English we would use "hit on" someone, as in flirt with someone,try to get their telephone #, etc
My friend was trying to hit on the waitress at the bar.

2. She is always creeping around the boss and I hate it.


3. I hope my little son fits in at his new school.

4. I am very shy and won't join in any sport activities.

5. He will lounge around by the swimming pool when he will take holidays.
In American English, we would say, "During his vacation, he'll lounge around the pool."

Practicing phrasal verbs - Are these sentences correct ? Thank you!

Hello everybody. I am using phrasal verbs from different countries but I also would like to know how you say the same thing in your country with your own phrasal verbs.

1. chat up

2. creep round

3. fit in

4. join in

5. lounge around

1. My friend was trying to chat up a waitress in the bar. 

2. She is always creeping around the boss and I hate it. ("creeping around" would be the colloquially phrase)

3. I hope my little son fits in at his new school. 

4. I am very shy and won't join in any sport activities.

5. He will lounge around by the swimming pool when he will take holidays.

These look great! Just a few minor errors