In addition to some of the occupations listed by you all...there are most likely area modeling agencies that have "promotional" divisions -- where, for a flat or hourly rate, you can book a promo model(s) to work and event hand out fliers, spray perfume samples, etc etc.
Promo girls are sometimes girls trying to break into modeling for magazines and/or get some recognition and exposure under their belts by working at high visibility events such as this. Fitness modeling is a great way for some girls to get into modeling if they have the face and body but not the height for mainstream high-fashion/runway modeling type work.
Some of the girls are fitness/figure/bikini competitors or contracted athletes - depending on the booth/sponsor for which they are working.
See you all at the O.
AM