I don't think "boy bands" would have worked for this show or really any musical guests. But I definitely think TNG or DS9 could have made a "weekly musical guest" mandate work. Just stick them in Quark's bar or Ten Forward or up in Vic's. Not that I think it's a good idea, just it could be done. B5 did it in the episode "Walkabout", kinda. But Enterprise is the complete wrong show for that. It's like having a musical guest on a submarine or on a space shuttle. But who knows, maybe NSYNC could have helped fight the Xindi or something