to split the bill	each person will pay for himself
sth is on me	I am paying for you
to join sb	come with sb
to be our guest	we will pay
let me get this	let me pay the bill this time
to win and dine	invited out to restaurant
impeccable	perfect,cannot be faulted
sluggish	rather slow
courteous	polite
overbearing	too confident/too inclined to tell people what to do
sullen	bad-tempered/unwilling to smile
brusque	quick and rude
off-putting	makes you feel you do not want to ho there again
go out of their way	do everything possible
to have a sweet tooth	love sweet things
to bring a bottle	usually means a bottle of wine
dinner party	rather formal dinner with guests
informal get-together	infromal group of people meeting for a meal
seconds	a second helping/serving of a dish
say when	tell me when I have served enough
when!	that's enough, thanks
nibbles	things like nuts,crisps before meal
grab a bite to eat	have a quick meal
takeaway	ready-cooked bought to tak home
cordially	warmly