"I would like a beer."
Translation:Kérek egy sört.
"Kérek szépen" literally translates to "I ask (for something) nicely", while "szeretnék kérni" is "I would like to ask (for something)". Both are polite, especially the latter, and you're free to use any of the two in a conversation.
Why is my answer "Sört kérek" not correct? Is that not polite enough maybe?