One romance novel I can recommend: "Valentine Bachelors" by Elise Title, Pamela Bauer, and Tiffany White. It basically consists of a prologue to set it up, each of the authors contributes a story, and an epilogue to tie it all up. The basic scenario is that it's New Year's Eve and three friends are at a bar, each without a date. In the course of events, they make a bet to advertise for a date in the personals.
It was one of the first romance novels I ever read, and it is still one my favorites. One thing I like about it is that the humor comes naturally from the characters, rather than being forced. You should be able to find it easily on-line or at your local used-book store.