Teachers,<br/><br/>Suppose you ask someone to go have a cup of coffee with you, which of the following expressions are consider be correct to use:<br/><br/>Let's go for <b>coffee</b>./Let's go for <b>a coffee</b>./Let's go for <b>some coffee</b>.<br/><br/>Similarly,<br/><br/>Let's go get <b>coffee</b>./Let's go get <b>a coffee</b>./Let's go get <b>some coffee</b>.<br/><br/>Let's go have <b>coffee</b>./Let's go have <b>a coffee</b>./Let's go have <b>some coffee</b>.<br/><br/>Also for food:<br/><br/>Let's go for Chinese/Let's go for some Chinese.<br/><br/>If in case they are all correct, please point the most popular one(s) and explain the differences if any.<br/><br/>Thank you