在 + Location + 集会
集会 (jíhuì) means "to assemble" or "to gather" and can function as both a verb and a noun. It refers to a group of people coming together for a meeting, rally, or gathering.
周末公园里有一场集会,讨论环保问题。
Zhōumò gōngyuán lǐ yǒu yī chǎng jíhuì, tǎolùn huánbǎo wèntí.
There is a gathering in the park this weekend to discuss environmental issues.
学生们在广场上集会,庆祝毕业。
Xuéshēngmen zài guǎngchǎng shàng jíhuì, qìngzhù bìyè.
The students gathered in the square to celebrate graduation.
市民们自发集会,纪念这位伟大的作家。
Shìmínmen zìfā jíhuì, jìniàn zhè wèi wěidà de zuòjiā.
Citizens spontaneously gathered to commemorate this great writer.