arrogant : 也是贬义，指过高估计自己，以致骄傲自大或傲慢无礼，目中无人。a cocky person would be more boastful,
an arrogant person might just give off a sense of thinking they are superior.
approve of sb. - 满意，喜欢 (某人)
budget for sth.- … 的预算；注意不要用介词of; budget for sth.
The company has drawn up a budget for the coming fiscal year.
for a reason – 不是无缘无故的，是有原因的，
open bar -a bar at a reception that serves drinks that’ve been paid by the host; Free drinks (American English) (主办方已经付过费的) 免费酒水吧
Tab (tabulation制成表格；清单显示) - 不是一次的消费，好多的消费小账单的总和。
do Separate checks -分开结帐, 分别买单
Split the check / bill -平均分摊费用
If you had asked me that, then you would have known.