casual client

例句：

1. 1. We often have casual clients come in for a cup of coffee.
   我们经常有临时客户来喝咖啡。
2. 2. The restaurant has a lot of casual clients coming in for lunch.
   这家餐厅有很多临时客户来吃午餐。
3. 3.Many businesses rely on casual clients to supplement their regular business.
   许多企业依赖临时客户来补充他们的常规业务。