Any after event luncheons need to be kept simple. I would suggest sliced ham, rolled, assorted cheese, deviled eggs, mixed fruit (served in disposable cocktail glasses) and or jello salad, potato salad, assorted breads, cookies, beverage and always a good seller, wieners in casings, which can be put into a pot and brought to a boil and served on a hotdog bun. I am not talking about hot dogs. Wieners are in casings, which are twisted and sold by the pound in a string. Eckridge has a very good product, sold in a box of about 2 lbs, maybe 2.5 lbs. I pay $8.99 for a box. If I remember correctly there are about 8 wieners to a lb. They don't have turkey, chicken and fillers. For 75 people, you should get someone to set up the food, since you will be absent. There are 32 cooking spoons (about 1 serving) to a gallon of potato salad. Sturdy appropriate disposable plates and utensils are acceptable, IMO. 2 family size tea bags and 4 regular size green tea bags, brewed and diluted will make 1/2 gallon of tea for iced tea. We like Arnold Palmers, which is this tea over ice with about 1/4 glass of lemonade. A christening cake would be lovely, however, unless you are prepared to pay close to $100 for a rather mediocre cake, I'd just have homemade sheet cakes. Texas Cake baked in an approx. 12x17 pan, serves lots of people and is a real winner. I don't know what you are prepared to spend or if you have something more elaborate in mind, but I suspect if that would be the case, you would be having a catered affair or going to a restaurant. My estimation for the type of luncheon I described above would cost approx. $125, if you do most of the food yourself and volunteer help, from scratch. That cost, I have based on our local midwest prices. City dwellers, I would expect, could count on spending more. I would also suggest not buying Deli ham. That's too expensive. Buy a small Kretschmar or Mickelbery ham and have it sliced. A small 8lb ham will more than feed 75 people. Ham goes a long way. Marble rye bread and $rolls are good choices for ham.