欢迎宴会 Welcome dinner
便宴 Informal dinner
工作午餐 Working luncheon
自助餐 Buffet dinner/luncheon
答谢宴会 Return dinner
告别宴会 Farewell dinner
庆功宴 Glee feast
招待会 Reception
茶话会 Tea party

为…举行宴会/宴请 Host a dinner/banquet/luncheon in honor of …
In honor of sth:为某事举行的宴请，in honor of sb:为某人设宴洗尘

愿为您效劳！ At your service!

现在我提议，为了…和…之间的合作，为了…的健康，干杯！ At this point, I propose a toast: to the cooperation between … And … , to the health of …, cheers!
请各位举杯并同我一起为所有在座的朋友们的健康干杯！ I'd ask you to raise your glass and join me in a toast to the health of all our friends present here.
敬您一杯！ Here's to you!
祝你健康！ To your health!
随量！ Whatever you like!
我失陪一会儿！ Excuse me for a minute.