5 minutes if you don't stop for a much less expensive beer on the way. If this is your first trip, go and see it, everyone does at least once. Kinda like going to DR Falls on the Ocho Rios side of the island. You go once, just so you tell others to just go once.
It is about a 10 or 15 minute walk along the beach to the south. Not far at all. However it has never been a highly recommended stop on this messag board. Food and drink prices are high and service has been questionable by those that have visited.
That said, we have stopped by on the beach to watch games and contests for patrons. We have, however, not gone in or participated. Seems lively and most folks appear to be having a very good time. If Margaritaville is your bag, have at it.
Not far, maybe 10 minute walk. I never heard Buffet music there but I have only walked by and did not go in. You can hear the music outside.... I have heard that the drinks are expensive but like I said, I didn't go in. I did eat at the marg ville in the airport... Not so hot!!!