A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
I would tip in an iPad place the same as I would in a buffet: Normally leave something but not the usual 15-20% in the USA. My standard would probably be 10% depending on whether there were drink refills etc. I wouldn't leave less than $1, but a $1 tip would seem like a lot for a nonalcoholic drink only.