dì yī cì cān jiā shí kě yǐ xiān děng zhǔ rén ān pái huò zhě wèn wǒ zuò nǎ lǐ bǐ jiào hé shì

第一次参加时，可以先等主人安排，或者问：“我坐哪里比较合适？

When attending for the first time, you can wait for the host's arrangement, or ask: 'Where should I sit?'