Two Questions

Two quick questions today -- tomorrow, my reflections on the conference.

1) How much should you leave as a tip for the housekeepers in a hotel? Does it make a difference whether it is a swanky upscale hotel or a fleabag motel? Is it a function of the number of nights you stay? Does it matter if you asked for changes in linens daily as opposed to only having service after you check out?

2) Do elders deserve special respect by virtue of being elders? Does wisdom necessarily come with experience? Is an elder anyone older than you or is there a specific age at which one becomes an elder? Is it a matter of the difference in ages?