Newbie Questions

Okay...so I'm hosting a social for my military spouses' group and am considering using this game for it. But I have a few questions first to make sure it's the right "fit".
1) Our socials only last 2 hours to 2 1/2 hours TOPS. Is that enough time to complete this game without it feeling rushed?
2) There are approximately 15 to 20 women who attend these things...is that too many people for this game to be fun and have EVERYONE participating? Don't want anyone to feel left out.
3) We have a mix of shy/outgoing people...is it better to use a scripted or unscripted format?
I'm sure I'll come up with other questions...but this will help me get started. Thanks!
1) Our socials only last 2 hours to 2 1/2 hours TOPS. Is that enough time to complete this game without it feeling rushed?
2) There are approximately 15 to 20 women who attend these things...is that too many people for this game to be fun and have EVERYONE participating? Don't want anyone to feel left out.
3) We have a mix of shy/outgoing people...is it better to use a scripted or unscripted format?
I'm sure I'll come up with other questions...but this will help me get started. Thanks!