What time of year is it?
For 60ish people, I'd set up 8 tables of 8, and do some kind of platter/selection that would be served at each table.
If it's summer, a picnic basket of baguette, camembert, pate, cherry tomatoes, pork pie, grapes, strawberries, celery etc.
Or a big mezze platter per table of falafel, pita, tzatsiki, taramasalata, hummus, olives, dolmedes, feta or halloumi, baklava.
Or a big anti pasti selection, with charcuterie and cheeses, olives, cherry toms, fresh bread, EVO oil & balsamic etc.
Things I'd hate and wouldn't eat would include jaxket potatoes (sorry), bloody chilli con carne or a hot dog station.