?? about fraternity summer rush parties

[FSUZeta]

my daughter has two friends who are incoming freshman at a southern college. both have received letters from a fraternity inviting them to attend a couple of rush parties over the summer.

my question is this: if they like the members, and are offered a bid, but would prefer to meet all the fraternities(waiting until the fall) before making their decision, what is the best way for them to handle this?