Welcome to Greekchat, Lara!
My chapter has had a luau bid day, a Mardi Gras bid day, and a "Home" bid day in the past few years. None of the sayings on our shirts particularly went with the theme, but they were originally thinking of "There's No Place Like Home" for this year. We had also thought about doing a "Cheers" theme with "Where Everybody Knows Your Name", but another chapter used it for a mixer/date party shirt earlier in the semester. My favorite bid day saying that we had was, "This opportunity only comes along once in a lifetime. Sorry You missed it!" If you need any more bid day sayings, there are threads all over GC about it. I would do the search for you, but I have to run. Hope this helps!
ITB, Sharon
