It's best to consider your evening venues in terms of "early evening" and "late evening" (or early morning). A good top pick is the White Horse, just a few steps from Lake Geneva in Ouchy where you find numerous expats as well as locals competing on darts and meeting interesting people with whom to party later. Another choice for this early evening debut is Kerrigans, Lausanne's own "sort of" Irish bar with all the usual Irish beverages and a rooftop terrace with views in the summer. Good food and early evening entertainment can be found at the Bleu Lézard.
For something more Germanic and atmospheric as well as a good selection of German food and ale, there is the Bavaria to eat and warm up for the evening. A good Top pick for the interim (between cocktails, dinner and midnight or later when the dancing starts). I like a very funky bar with tons of atmosphere that's been there forever called the Lapin Vert (The Green Rabbit).
Then the party begins. At the private club MAD and you can always find a member to invite you in. It's a different great gig every night. Atelier Volant) is a popular pick in the night scene of the Flon. If you can't stand another minute of techno, the Cave at Chorus is a great jazz club with a variety of artists. Les Docks is an excellent venue for many great concerts, so check what's on when you're here. And there is always something at The Loft Electroclub which is almost entirely dedicated to techno music that attracts the young and soon-to-be deaf crowd.
avenue d'Ouchy 66
Ouchy's Finest Pub...
rue de la Barre 8
The Irish Bar in Town...
rue Enning 10
Popular Bar in Town...
rue du Petit-Chêne 10
German Brasserie...
ruelle du Lapin-Vert 2
Lively and Atmospheric located Behind the Cathedral...
Rue de Geneve 23
Iconic MAD Private Dance Club (but non members are welcome for an entrance fee of $25)in the trendy Flon neighborhood, once a warehouse and industrial area only renovated in recent years. Members can bring 2 guests free...
rue des Côtes de Montbenon 12
Entertainment Galore...
avenue de Mon-Repos 3
Jazz and Goodies...
avenue de Sévelin 34
Music & More...
place Bel-Air 1
Young crowd loving super DJ sounds and lights...
rue Saint-Laurent 19
Concert Hall and Home of the Orchestra de Lausanne...
avenue des Bergières 10
Multi-Purpose Theater...
rue du Port-Franc 16
Cinematic Excellence...
rue de Bourg 51
A Popular Nocturnal Hangout...
place du Nord 4
Atmosphere Counts...
av. de la Harpe 45
Different activities...
rue de Genève 21
Symposium...
route Aloys-Fauquez 4
Original Movies on Tap...
rue de la Grotte 3
Gem of All...
quai d'Ouchy 1
Impressive Auditorium...