ひとりだとそんなに種類を食べられないので、複数人いると「どっかに食べに行こうかな」という気になるのは確かですねー。
ひとりだとファストフード等に入って終わらせる確率が上がります(^^;)

I don't eat that wide a variety of foods by myself, but I do get that "Let's go eat somewhere" feeling when I'm with several others, to be sure. When I'm on my own, the chances go up that I'll wind things up by just going to a fast food place or something. (^^;)