Tonight is my treat.
今晚是我请客。

treat
招待；款待
Don't worry about the cost,I'll treat you.
不用担心费用，我来帮你付。
I'm going to treat myself to a new pair of shoes.
我打算给自己买一双新鞋。
It's on me.
我买单。

A:Did you enjoy your dinner?
晚餐吃得愉快吗？
B:Yes,it was great.Should we get the check?
是的，好极了。我们该结账了吧？
A:Ok.Excuse me,waiter?Could we get the check?
好的。你好，服务员？我们可以买单了吗？
B:Sure,right away.
当然，马上就来。
A:Thanks for taking me out,Bob.Shall we split the bill?
谢谢你今晚带我出来，鲍勃。我们各付各的吧。
B:No,tonight is my treat!You took me out last week,remember?
不，今晚是我请客。上周是你带我出来吃的饭，还记得吗？
A:Okay,well let me get the tip then.
好吧，那我来给小费吧。
B:Alright,that sounds fair.
好吧，这听上去很公平。
C:Okay,folks.The bill is $50.25.
好了，客人们，一共是50.25美元。
A:Do you take credit card?
可以刷信用卡吗？
C:Sorry,cash only.
对不起，只收现金。
B:How much should I tip,Bob?
我应该给多少小费呢？鲍勃？
A:I usually do 20%.
我通常都是给20%。