I chose not to vote for drinking, because, really, it can be combined with any of the other activities you've listed. Yes, any of them.
I agree with Penelope.
I voted for:
1. Horseback riding, but mountaineering, fishing, hunting, (or camping) could all be subsitured, depending on budget (horses eat A LOT, and unless you have a place in the country, there are stable fees), and practicality. An outdoor activity is always good.
2. Piano. WRC said it best: "... because it is intellectual, social and will always be fashionable." Plus, once you learn the keybord you could go on to learn the organ (something ALL churches need).
3. For other, I'd suggest something that can be both creative and practical: woodworking, metalworking, sewing, candlemaking, automotive skills (maybe even restoring a vintage vehicle) gardening, etc.