Mysql Naming Convention

[kirk]

I was wondering if there is a mysql naming convention for tables and 
columns.

I name my table names in a non plural form.

client
user

And I do my column names in the same way

client_id
user_id

My coworker does them in the plural form.

clients
users

And then he names his columns like

client_id
user_id

Is there a right or wrong way to do it ?
I really hate the plural table names.

Thanks.