I worked with a friend's catering company for awhile. It's easy work if you know your way around an industrial kitchen. If you've ever worked in a restaurant, it's cake to work for a caterer.
You DO work some long crazy hours and at some strange events. I've worked weddings, birthdays, anniversaries, holiday parties at customers homes, a swingers freak a thon at a strip club, political events, public events like music festivals, etc. I got tipped $150 bucks by a man who had us at a Christmas party for tending bar at his kitchen table for like 4 hours.
It has it's pros and cons, but all around it's good work for anyone in between gigs or going to school.
Invest now in a good pair of plain black shoes that are COMFORTABLE, like Rockports or something. Many events will require you to be in a tux shirt/tie and black slacks and dress-ish shoes.
And the leftover food ROCKS.